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Robert Soupe

Math aficionado. No formal math education beyond high school.

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Top Questions
32 votes

Why would the binary language of moisture vaporators be that different from the binary language of other machines or droids?

star-wars languages droids asked Aug 9 '15 at 17:09
scifi.stackexchange.com

31 votes

Did anyone wonder why there was one planet fewer before beaming down to Ceti Alpha V/VI?

star-trek the-wrath-of-khan asked Aug 5 '14 at 2:40
scifi.stackexchange.com

14 votes

Is 39 moves the longest a chess game can go moving only pawns?

recreational-mathematics asked Jul 2 '14 at 2:44
math.stackexchange.com

12 votes

When did the writers of Star Trek decide the Federation doesn't use money?

star-trek money asked Sep 5 '16 at 22:52
scifi.stackexchange.com

9 votes

Does the alternating sum of prime reciprocals converge?

sequences-and-series prime-numbers asked Jun 18 '17 at 23:16
math.stackexchange.com

9 votes

What is the most efficient way to replace items in a list at periodic intervals?

list-manipulation performance-tuning asked Mar 25 '16 at 18:08
mathematica.stackexchange.com

8 votes

Under the Gregorian calendar, what days can never be Easter?

soft-question calendar-computations asked Apr 5 '15 at 23:34
math.stackexchange.com

6 votes

Does the $5x + 1$ sequence for 7 reach a power of 2 or does it get stuck in a period?

number-theory collatz asked Jul 6 '15 at 3:30
math.stackexchange.com

6 votes

What is the worst case for the Euclidean algorithm in $\mathbb Z[i]$?

algebraic-number-theory euclidean-algorithm asked Oct 14 '18 at 23:36
math.stackexchange.com

5 votes

What would be some winning strategies for a prime factorization lottery?

prime-factorization asked Jan 13 '16 at 3:42
math.stackexchange.com

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Top Answers
28
What is Trinity Hall Prime number?
math.stackexchange.com

11
How does passing to ideals solve the problem of unique factorization?
math.stackexchange.com

10
Describe the multiples of $21$ that ends with $241$
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10
What is the name for a group of five?
music.stackexchange.com

10
What are some other ways to compute the factorials using addition only?
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9
Is the sum of two distinct primes an injective function on integers?
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9
Suppose that both $p$ and $p^2 +2$ are prime numbers. Show that $p=3$.
math.stackexchange.com

9
Ring of algebraic integers as lattice points in the complex plane
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8
Why does the symbol for the multiplication operation change shape?
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8
What is the Euclidean function for $\mathbb{Z}[\sqrt{14}]$?
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8
What is the Euclidean function for $\mathbb{Z}[\sqrt{14}]$?
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8
Show that $\sqrt{-6}$ is irreducible in $\mathbb{Z}+\mathbb{Z}\sqrt{-6}$
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8
So what *is* the Euclidean function for $\mathcal{O}_{\mathbb{Q}(\sqrt{69})}$?
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8
$x^2 - (x - 1)$ is prime?
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7
Find all primes of the form n^3+1
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7
Is there a prime $p$ whose successor is greater than $2p$?
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7
Do we have negative prime numbers?
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7
$\textbf Z[\sqrt{pq}]$ is not a UFD if $\left( \frac{q}p \right) = -1$ and $p \equiv 1 \pmod 4$.
math.stackexchange.com

7
Show that $\mathcal{O}_K$ is not UFD with $K = \mathbb{Q}(\sqrt{-13})$
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7
Suppose $p, p+2, p+4$ are prime numbers. Prove that $p = 3$ not using division algorithm.
math.stackexchange.com

7
Prove that $\sum^{n-1}_{i=1}i^{(n-1)} \equiv -1$ (mod $n$) for all prime $n\in\mathbb{N}$.
math.stackexchange.com

7
Is $\mathbb{Z}[\sqrt{15}]$ a UFD?
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6
There are infinitely many prime numbers $p$ for which $p + 2$ and $p + 4$ are also prime numbers
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6
Prove that if $w \in \mathbb{Z}[\sqrt{3}]$ and $N(w)$ is a prime, then $w$ is prime also
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6
Prove that if $w \in \mathbb{Z}[\sqrt{3}]$ and $N(w)$ is a prime, then $w$ is prime also
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6
Alternative form of Eisenstein integers
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6
Why is the Fundamental Theorem of Arithmetic so important?
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6
Sum of three consecutive prime numbers is $173$
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6
Given $d \equiv 1 \pmod 4$, can $\mathcal{O}_{\mathbb{Q}(\sqrt{d})}$ have a fundamental unit that is not a “half-integer”?
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6
Is this $\gcd(0, 0) = 0$ a wrong belief in mathematics or it is true by convention?
math.stackexchange.com

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