Tạp chí Hình học Geometricorum

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Some properties of inversions in alpha plane - Ozcan Gelişgen and Temel Ermis

LTTK CTV, 12/10/19

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0

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585

LTTK CTV

12/10/19
Integer sequences and circle chains inside a hyperbola - Giovanni Lucca

LTTK CTV, 12/10/19

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0

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348

LTTK CTV

12/10/19
Adjugate points and adjugate triangle - Sandor Nagydobai Kiss

LTTK CTV, 12/10/19

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0

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325

LTTK CTV

12/10/19
Heptagonal triangle and trigonometric identities - Kai Wang

LTTK CTV, 12/10/19

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0

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349

LTTK CTV

12/10/19
The radical axis of the circumcircle and incircle of a bicentric quadrilateral - Michael Diao and Andrew Wu

LTTK CTV, 12/10/19

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0

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415

LTTK CTV

12/10/19
Division of an angle into equal parts and construction of regular polygons by multi-fold origami - Jorge C. Lucero

LTTK CTV, 12/10/19

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0

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340

LTTK CTV

12/10/19
Some Archimedean circles in an arbelos - Le Viet An and Emmanuel A. J. Garcia

LTTK CTV, 12/10/19

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0

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380

LTTK CTV

12/10/19
A remark on Archimedean incircles of an isosceles triangle - Hiroshi Okumura

LTTK CTV, 12/10/19

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0

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292

LTTK CTV

12/10/19
A Polynomial Approach to the Bloom of Thymaridas and the Apollonius’ Circle - Gerasimos T. Soldatos

LTTK CTV, 12/10/19

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0

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335

LTTK CTV

12/10/19
The Love for the Three Conics - Stefan Liebscher and Dierck-E. Liebscher

LTTK CTV, 12/10/19

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0

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296

LTTK CTV

12/10/19
Polygons on the Sides of an Octagon - Rogerio Cesar dos Santos

LTTK CTV, 12/10/19

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275

LTTK CTV

12/10/19
A Remarkable Theorem on Eight Circles - Gabor Gevay

LTTK CTV, 12/10/19

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0

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432

LTTK CTV

12/10/19
Pairs of Congruent-Like Quadrilaterals that are not Congruent - Giuseppina Anatriello, Francesco Laudano, and Giovanni Vincenzi

LTTK CTV, 11/10/19

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0

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335

LTTK CTV

11/10/19
Integral Triangles and Trapezoids Pairs with a Common Area and a Common Perimeter - Yong Zhang, Junyao Peng, and Jiamin Wang

LTTK CTV, 11/10/19

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0

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435

LTTK CTV

11/10/19
Circumconics with Asymptotes Making a Given Angle - Francisco Javier Garcıa Capitan

LTTK CTV, 11/10/19

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0

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269

LTTK CTV

11/10/19
Pedals of the Poncelet Pencil and Fontene Points - Roger C. Alperin

LTTK CTV, 11/10/19

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0

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306

LTTK CTV

11/10/19
Simple Proofs of Feuerbach’s Theorem and Emelyanov’s Theorem - Nikolaos Dergiades and Tran Quang Hung

LTTK CTV, 11/10/19

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0

Đọc:

407

LTTK CTV

11/10/19
Orthopoles and Variable Flanks - Floor van Lamoen

LTTK CTV, 11/10/19

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0

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300

LTTK CTV

11/10/19
Self-Pivoting Convex Quadrangles - Paris Pamfilos

LTTK CTV, 11/10/19

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0

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269

LTTK CTV

11/10/19
Geometric Inequalities in Pedal Quadrilaterals - Sahlar Meherrem

LTTK CTV, 11/10/19

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0

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338

LTTK CTV

11/10/19
Is The Mystery of Morley’s Trisector Theorem Resolved - Omid Ali Shahni Karamzadeh

LTTK CTV, 11/10/19

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0

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271

LTTK CTV

11/10/19
A Model of Nowhere Geodesic Plane Geometry in which the Triangle Inequality Fails Everywhere - John Donnelly

LTTK CTV, 11/10/19

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0

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292

LTTK CTV

11/10/19
A Model of Continuous Plane Geometry that is Nowhere Geodesic - John Donnelly

LTTK CTV, 11/10/19

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0

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275

LTTK CTV

11/10/19
A New Proof of Pitot Theorem by AM-GM Inequality - Robert Bosch

LTTK CTV, 11/10/19

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0

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311

LTTK CTV

11/10/19
New Constructions of Triangle from α, b − c, tA - Martina Stepanova

LTTK CTV, 11/10/19

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0

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323

LTTK CTV

11/10/19
A Construction of the Golden Ratio in an Arbitrary Triangle - Tran Quang Hung

LTTK CTV, 11/10/19

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0

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455

LTTK CTV

11/10/19
Algebraic Equations of All Involucre Conics in the Configuration of the c-Inscribed Equilateral Triangles - Blas Herrera

LTTK CTV, 11/10/19

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322

LTTK CTV

11/10/19
The Treatise on the Chord and Sine - Mohammad K. Azarian

LTTK CTV, 11/10/19

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0

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366

LTTK CTV

11/10/19
Parallelograms Inscribed in Convex Quadrangles - Nikolaos Dergiades

LTTK CTV, 11/10/19

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0

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340

LTTK CTV

11/10/19
Side Disks of a Spherical Great Polygon - Purevsuren Damba and Uuganbaatar Ninjbat

LTTK CTV, 11/10/19

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0

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268

LTTK CTV

11/10/19
The Blundon Theorem in an Acute Triangle and Some Consequences - Mihaly Bencze and Marius Dragan

LTTK CTV, 11/10/19

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0

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362

LTTK CTV

11/10/19
Rectangles Circumscribing a Quadrangle - Paris Pamfilos

LTTK CTV, 11/10/19

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0

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287

LTTK CTV

11/10/19
Harmonic Mean and Division by Zero - Hiroshi Okumura and Saburou Saitoh

LTTK CTV, 11/10/19

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0

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292

LTTK CTV

11/10/19
A Geometric Inequality for Cyclic Quadrilaterals - Mark Shattuck

LTTK CTV, 11/10/19

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0

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346

LTTK CTV

11/10/19
The Circle of Apollonius in Hyperbolic Geometry - Eugen J. Ionascu

LTTK CTV, 11/10/19

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0

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277

LTTK CTV

11/10/19
Constructing a Triangle from Two Vertices and the Symmedian Point - Michel Bataille

LTTK CTV, 11/10/19

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0

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278

LTTK CTV

11/10/19
A Curvature Invariant Inspired by Leonhard Euler’s Inequality R ≥ 2r - Nicholas D. Brubaker

LTTK CTV, 11/10/19

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0

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267

LTTK CTV

11/10/19
An Extension of Miquel’s Six-Circles Theorem - Gabor Gevay

LTTK CTV, 11/10/19

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0

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349

LTTK CTV

11/10/19
On the Cyclic Quadrilaterals with the Same Varignon Parallelogram - Sandor Nagydobai Kiss

LTTK CTV, 11/10/19

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0

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262

LTTK CTV

11/10/19
Remarks for The Twin Circles of Archimedes in a Skewed Arbelos by Okumura and Watanabe - Hiroshi Okumura and Saburou Saitoh

LTTK CTV, 11/10/19

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0

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314

LTTK CTV

11/10/19
A Toroidal Approach to the Doubling of the Cube - Gerasimos T. Soldatos

LTTK CTV, 11/10/19

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0

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256

LTTK CTV

11/10/19
Parabola Conjugate to Rectangular Hyperbola - Paris Pamfilos

LTTK CTV, 11/10/19

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0

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286

LTTK CTV

11/10/19
A New Proof of Erdos-Mordell Inequality - Robert Bosch

LTTK CTV, 11/10/19

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0

Đọc:

498

LTTK CTV

11/10/19
A Family of Triangles for which Two Specific Triangle Centers Have the Same Coordinates - Francisco Javier Garcıa Capitan

LTTK CTV, 11/10/19

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0

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324

LTTK CTV

11/10/19
Primitive Heronian Triangles With Integer Inradius and Exradii - Li Zhou

LTTK CTV, 11/10/19

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0

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314

LTTK CTV

11/10/19
Twins of Hofstadter Elements - Apostolos Hadjidimos

LTTK CTV, 11/10/19

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0

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277

LTTK CTV

11/10/19
On the Extrema of Some Distance Ratios - Michel Bataille

LTTK CTV, 11/10/19

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0

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263

LTTK CTV

11/10/19
Integer Sequences and Circle Chains Inside a Circular Segment - Giovanni Lucca

LTTK CTV, 11/10/19

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0

Đọc:

291

LTTK CTV

11/10/19
Revisiting the Infinite Surface Area of Gabriel’s Horn - Lubomir P. Markov

LTTK CTV, 11/10/19

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0

Đọc:

305

LTTK CTV

11/10/19
A Remark on the Arbelos and the Regular Star Polygon - Hiroshi Okumura

LTTK CTV, 11/10/19

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0

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296

LTTK CTV

11/10/19
Two Hinged Regular n-sided Polygons - Manfred Pietsch

LTTK CTV, 11/10/19

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0

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292

LTTK CTV

11/10/19
Irrationality of √2 with Yet Another Visual Proof - Samuel G. Moreno and Esther M. Garcıa Caballero

LTTK CTV, 11/10/19

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0

Đọc:

284

LTTK CTV

11/10/19
Areas and Shapes of Planar Irregular Polygons - C. E. Garza-Hume, Maricarmen C. Jorge, and Arturo Olvera

LTTK CTV, 11/10/19

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0

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276

LTTK CTV

11/10/19
Revisiting the Quadrisection Problem of Jacob Bernoulli - Carl Eberhart

LTTK CTV, 10/10/19

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0

Đọc:

286

LTTK CTV

10/10/19
The Relativity of Conics and Circles - Stefan Liebscher and Dierck-E. Liebscher

LTTK CTV, 10/10/19

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0

Đọc:

421

LTTK CTV

10/10/19
On the circumscribing ellipse of three concentric ellipses - George E. Lefkaditis, Thomas L. Toulias, and Stelios Markatis

LTTK CTV, 10/10/19

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0

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373

LTTK CTV

10/10/19
Properties of a Pascal points circle in a quadrilateral with perpendicular diagonals - David Fraivert

LTTK CTV, 10/10/19

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0

Đọc:

338

LTTK CTV

10/10/19
Orthocenters of simplices in hyperbolic spaces - Kenzi Sato

LTTK CTV, 10/10/19

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0

Đọc:

360

LTTK CTV

10/10/19
On some elementary properties of quadrilaterals - Paris Pamfilos

LTTK CTV, 10/10/19

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0

Đọc:

299

LTTK CTV

10/10/19
Golden elliptical orbits in Newtonian gravitation - Dimitri M. Christodoulou

LTTK CTV, 10/10/19

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0

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275

LTTK CTV

10/10/19
A cevian locus and the geometric construction of a special elliptic curve - Igor Minevich and Patrick Morton

LTTK CTV, 10/10/19

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0

Đọc:

267

LTTK CTV

10/10/19
The first sharp gyrotriangle inequality in M bius gyrovector space - Andrei Moldavanov

LTTK CTV, 10/10/19

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0

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297

LTTK CTV

10/10/19
Classical right-angled triangles and the golden ratio - Andrei Moldavanov

LTTK CTV, 10/10/19

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0

Đọc:

266

LTTK CTV

10/10/19
Isogonal conjugates in an n-simplex - Jawad Sadek

LTTK CTV, 10/10/19

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0

Đọc:

283

LTTK CTV

10/10/19
Heron triangle and rhombus pairs with a common area and a common perimeter - Yong Zhang and Jinyao Peng

LTTK CTV, 10/10/19

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0

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273

LTTK CTV

10/10/19
Two interesting integer parameters of integer-sided triangles - Jose De la Cruz and John F. Goehl

LTTK CTV, 10/10/19

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0

Đọc:

267

LTTK CTV

10/10/19
Orthopoles, flanks, and Vecten points - Todor Zaharinov

LTTK CTV, 10/10/19

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0

Đọc:

285

LTTK CTV

10/10/19
The periambic constellation with Altitudes, perpendicular bisectors, and other radical axes in a triangle - Dixon J. Jones

LTTK CTV, 10/10/19

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0

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357

LTTK CTV

10/10/19
The Simson triangle and its properties - Todor Zaharinov

LTTK CTV, 10/10/19

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0

Đọc:

309

LTTK CTV

10/10/19
Radii of circles in Apollonius' problem - Milorad R. Stevanovic, Predrag B. Petrovic, and Marina M. Stevanovic

LTTK CTV, 10/10/19

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0

Đọc:

353

LTTK CTV

10/10/19
Three synthetic proofs of the Butterfly Theorem - Nguyen Tien Dung

LTTK CTV, 10/10/19

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0

Đọc:

249

LTTK CTV

10/10/19
On centers and central lines of triangles in the elliptic plane - Manfred Evers

LTTK CTV, 10/10/19

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0

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260

LTTK CTV

10/10/19
Orthocenters of simplices on spheres - Kenzi Sato

LTTK CTV, 10/10/19

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0

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273

LTTK CTV

10/10/19
On the Feuerbach triangle - Dasari Naga Vijay Krishna

LTTK CTV, 10/10/19

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0

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303

LTTK CTV

10/10/19
Another simple construction of the golden section in an isosceles triangle - Tran Quang Hung

LTTK CTV, 10/10/19

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0

Đọc:

278

LTTK CTV

10/10/19
On the relations between truncated cuboctahedron, truncated icosidodecahedron and metrics - Özcan Gelisgen

LTTK CTV, 10/10/19

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0

Đọc:

252

LTTK CTV

10/10/19
A group theoretic interpretation of Poncelet's theorem with the complex case - Albrecht Hess

LTTK CTV, 10/10/19

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0

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260

LTTK CTV

10/10/19
The two incenters of an arbitrary convex quadrilateral - Nikolaos Dergiades and Dimitri M. Christodoulou

LTTK CTV, 10/10/19

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0

Đọc:

256

LTTK CTV

10/10/19
Properties of the tangents to a circle that forms Pascal points on the sides of a convex quadrilateral - David Fraivert

LTTK CTV, 10/10/19

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0

Đọc:

329

LTTK CTV

10/10/19
Reflections and incidence constraints on the plane - Jorge C. Lucero

LTTK CTV, 10/10/19

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0

Đọc:

267

LTTK CTV

10/10/19
On the orthogonality of a median and a symmedian - Navneel Singhal

LTTK CTV, 10/10/19

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0

Đọc:

284

LTTK CTV

10/10/19
About a strengthened version of Erdos-Mordell inequality - Dan Stefan Marinescu and Mihai Monea

LTTK CTV, 10/10/19

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0

Đọc:

280

LTTK CTV

10/10/19
Triangle constructions based on angular coordinates - Thomas D. Maienschein and Michael Q. Rieck

LTTK CTV, 10/10/19

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0

Đọc:

268

LTTK CTV

10/10/19
Projective geometry in relation to the excircles - Prasanna Ramakrishnan

LTTK CTV, 10/10/19

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0

Đọc:

282

LTTK CTV

10/10/19
On the Tucker circles - Sandor N. Kiss and Paul Yiu

LTTK CTV, 10/10/19

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0

Đọc:

275

LTTK CTV

10/10/19
New interpolation inequalities to Euler's R >= 2r - Dorin Andrica and Dan Stefan Marinescu

LTTK CTV, 10/10/19

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0

Đọc:

271

LTTK CTV

10/10/19
Gergonne meets Sangaku - Paris Pamfilos

LTTK CTV, 10/10/19

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0

Đọc:

292

LTTK CTV

10/10/19
Side lengths of Morley triangles and tetrahedra - Dragutin Svrtan and Darko Veljan

LTTK CTV, 10/10/19

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0

Đọc:

262

LTTK CTV

10/10/19
Another purely synthetic proof of Lemoine's theorem - Nguyen Tien Dung

LTTK CTV, 10/10/19

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0

Đọc:

359

LTTK CTV

10/10/19
Convexity and non-differentiable singularities in Mortici's paper on Fermat-Torricelli points - Martin Celli

LTTK CTV, 10/10/19

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0

Đọc:

268

LTTK CTV

10/10/19
Equilateral Jacobi triangles - Glenn T. Vickers

LTTK CTV, 10/10/19

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0

Đọc:

267

LTTK CTV

10/10/19
An improved inequality for the perimeter of a quadrilateral - Elliott A. Weinstein and John D. Klemm

LTTK CTV, 10/10/19

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0

Đọc:

269

LTTK CTV

10/10/19
A simple synthetic proof of Lemoine's theorem - Tran Quang Hung

LTTK CTV, 10/10/19

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0

Đọc:

322

LTTK CTV

10/10/19
Pascal's hexagram and the geometry of the Ricochet configuration - Jaydeep Chipalkatti

LTTK CTV, 10/10/19

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0

Đọc:

274

LTTK CTV

10/10/19
Putting the icosahedron into the octahedron - Paris Pamfilos

LTTK CTV, 10/10/19

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0

Đọc:

249

LTTK CTV

10/10/19
Steiner-Lehmus type results related to the Gergonne point of a triangle - Mark Shattuck

LTTK CTV, 10/10/19

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0

Đọc:

255

LTTK CTV

10/10/19
Another simple construction of the golden section with equilateral triangles - Tran Quang Hung

LTTK CTV, 10/10/19

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0

Đọc:

357

LTTK CTV

10/10/19
Do dogs know the bifurcation locus - Li Zhou

LTTK CTV, 10/10/19

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0

Đọc:

322

LTTK CTV

10/10/19
Chains of tangent circles inscribed in a triangle - Giovanni Lucca

LTTK CTV, 10/10/19

Trả lời:

0

Đọc:

320

LTTK CTV

10/10/19
Counting the number of isosceles triangles in rectangular regular grids - Chai Wah Wu

LTTK CTV, 10/10/19

Trả lời:

0

Đọc:

357

LTTK CTV

10/10/19

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