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Mathematics
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Rusurano
  • Member for 4 years, 2 months
  • Last seen this week
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About

I ask interesting questions on elementary math and geometry, as well as answer questions in my field of experience.

A small goal I have is to finish my book on Elementary Number Theory.

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Top posts
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question
8
Help me to get deeper understanding of Euler's proof of his Arithmetical Theorem
Jan 22, 2023
question
7
Prove that a triangle with bisectral triangle being a right triangle always has a 120-degree angle
Sep 13
question
7
How to prove the following discovery of Euler?
Jan 15, 2023
question
5
How to check for roots of a polynomial from a certain number set in certain range?
Jan 24, 2022
question
5
How to get roots with galley division?
Feb 12, 2022
question
5
Prove that $\sum_{k=1}^n\frac{\prod_{1\leq r\leq n, r\neq m}(x+k-r)}{\prod_{1\leq r\leq n, r\neq k}(k-r)}=1$
Feb 17, 2023
answer
4
Foci of ellipse
Feb 23, 2023
question
4
Representing the cube of any natural number as a sum of odd numbers
Feb 6, 2022
question
4
Looking for alternative proofs of this statement about angles
Apr 21
question
4
Is there a rule to find $\gcd(a^m,b^n)$?
Nov 12
Top network posts
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11
dayjs().startOf('day') shifts two hours back
9
How to manage multiple versions of npm modules in a project for different packages internally dependent on specific versions?
5
Chinese names for zeptoseconds and yoctoseconds