Reputation
343
Top tag
Next privilege 500 Rep.
Access review queues
Badges
1 13
Newest
 Tumbleweed
Impact
~2k people reached

Apr
4
comment Check if a number is Carmichael
The aim of the question is to implement a prime-testing algorithm using a method that first requires to rule out that the integer tested is a Charmichael number. Therefore "First check, whether the given number $n$ is prime" reaches that aim without requiring implementation of the rest of the answer.
Apr
3
revised Calculate third point of triangle from two points and angles
Make the picture visible, and smaller
Apr
3
answered Calculate third point of triangle from two points and angles
Apr
3
suggested approved edit on Calculate third point of triangle from two points and angles
Mar
13
comment Solving $x^e\equiv a\pmod n$
I'm solving for $x$, the only unknown. @ObinnaNwakwue
Feb
14
awarded  Tumbleweed
Feb
7
revised Name of that extension of modular inverse?
Add another kept property
Feb
7
revised Name of that extension of modular inverse?
Polish definition
Feb
7
asked Name of that extension of modular inverse?
Nov
22
comment prove that a complex number equation is real
@user26857: Thanks! Indeed these parenthesis were extraneous.
Nov
22
revised prove that a complex number equation is real
Add figure
Nov
22
revised prove that a complex number equation is real
added 24 characters in body
Nov
22
answered prove that a complex number equation is real
May
14
comment System of linear congruence, not relatively prime
Hint: use that you know the factorization of all the $m_i$ to write an equivalent system of equations where all the ${m_i}'$ are prime; check if it has solutions; and determine them using the CRT. $\;$ That can be made to work even if you do not known the factorizations of the $m_i$, by using $\gcd$. Complexity is is low, dominated by the final CRT step, I guess.
Jan
11
comment find the volume of the half-cone $\sqrt{x^{2}+y^{2}}<z<1,\ x>0$
@Axoren. Yes; thanks for noticing anyway. Fixed this, and the next issue about legibility, within the 5 minute allowance.
Jan
11
answered find the volume of the half-cone $\sqrt{x^{2}+y^{2}}<z<1,\ x>0$
Dec
22
revised System of linear diophantine modular inequalities
include a^j \not\equiv 1\pmod n in main statement
Dec
22
revised System of linear diophantine modular inequalities
use consistent terminology
Dec
22
asked System of linear diophantine modular inequalities
Dec
1
comment Find all the integral solutions to $x^6-y^6+3x^4y-3y^4x+y^3+3x^2+3x+1=0$
A gremlin crept in this accepted answer's algebra! $x^6-y^6+3x^4y-3y^4x+3x^2+3x+1=0$ IS NOT equivalent to $(x+1)^3+(x^2+y)^3=(x+y^2)^3$. $\;$ Proof: $x=-1$, $y=-1$ is a solution of the later, but not of the former. $\;$ Other proof: mechanically expand $(x+1)^3+(x^2+y)^3-(x+y^2)^3$, giving $x^6-y^6+3x^4y-3y^4x+3x^2+3x+y^3+1$, with that pesky $y^3$ term.