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Mathematics
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brainjam's user avatar
brainjam's user avatar
brainjam
  • Member for 15 years, 3 months
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About

mainly geometry -- euclidean, hyperbolic, projective, conformal, computational.

My gravatar image is a hyperbolic symmetry

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Top posts

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answer
24
Does there exist a circle with EXACTLY two rational points, no more, no less?
Jan 7, 2021
question
8
Is there a geometric construction that finds the intersection of two conics, given only five points on each?
Aug 7, 2019
answer
8
$S^3$ as union of 2 solid tori
Feb 5, 2021
question
7
Is there a name or a reference for these aperiodic rhomboidal tilings?
May 17, 2018
question
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, 2020
question
7
Show that the locus of a point in this geometric construction is a conic
Oct 27, 2021
answer
7
Dandelin's proof of Pascal's theorem
Oct 12, 2021
answer
7
An ellipse inside a heptagon
Mar 23, 2021
answer
6
Convexifying a Concave Polygon by Reflections
Nov 21, 2021
question
5
Is there an explanation for the patterns formed by the binomial coefficients $\binom{n+d-1}{d}\pmod{512}$?
Sep 22, 2010

Top network posts

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142
Best way to detect that HTML5 <canvas> is not supported
128
valueOf() vs. toString() in Javascript
101
Calculating the angle between two lines without having to calculate the slope? (Java)
82
Given a string describing a Javascript function, convert it to a Javascript function
79
javascript function leading bang ! syntax