Mathematics
brainjam
  • Member for 11 years, 5 months
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mainly geometry -- euclidean, hyperbolic, projective, conformal, computational.

My gravatar image is a hyperbolic symmetry

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21
Does there exist a circle with EXACTLY two rational points, no more, no less?
Jan 7 '21
7
For a recursion based on $x+y+z+2\sqrt{xy+yz+zx},$ does what happens in $\mathbb Z\left[\sqrt n\right]$ stay in $\mathbb Z\left[\sqrt n\right]$?
Dec 17 '20
7
Show that the locus of a point in this geometric construction is a conic
Oct 27 '21
6
Is there a geometric construction that finds the intersection of two conics, given only five points on each?
Aug 7 '19
6
Is there a name or a reference for these aperiodic rhomboidal tilings?
May 17 '18
6
Convexifying a Concave Polygon by Reflections
Nov 21 '21
5
An ellipse inside a heptagon
Mar 23 '21
5
Is there an explanation for the patterns formed by the binomial coefficients $\binom{n+d-1}{d}\pmod{512}$?
Sep 22 '10
5
Polygonal billiards and uniform distribution
Oct 4 '10
5
Let $A=(-1,0),B=(1,0), C$ be points in $\mathbb{R}^2.$ What is the locus of points $\{s\in\mathbb{R}^2:C$ lies on the angle bisector of $AsB$}?
Feb 7 '21
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78
javascript function leading bang ! syntax
70
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