Gadi A

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How to convince a layman that the $\pi = 4$ proof is wrong?

calculus pi fake-proofs asked Jun 4 '11 at 3:35

math.stackexchange.com

29 votes

Simple “real life” NP-hard problems?

computer-science np-complete asked May 17 '11 at 8:20

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27 votes

Uses of quadratic reciprocity theorem

number-theory quadratic-reciprocity motivation asked Nov 14 '10 at 9:49

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16 votes

Product of all elements in an odd finite abelian group is 1

group-theory finite-groups asked Nov 7 '10 at 19:42

math.stackexchange.com

15 votes

How fundamental is the fundamental theorem of algebra?

abstract-algebra polynomials terminology complex-numbers asked Sep 16 '10 at 14:20

math.stackexchange.com

15 votes

Primes of the form $n^2+1$ - hard?

number-theory reference-request prime-numbers open-problem asked Jun 8 '11 at 16:16

math.stackexchange.com

14 votes

Once and for all - “Rational numbers” - because of ratio, or because they make sense?

terminology math-history asked Sep 15 '11 at 19:29

math.stackexchange.com

14 votes

Reversing page order from a point onward

page-numbering asked Jun 27 '11 at 13:13

tex.stackexchange.com

13 votes

Prime dividing the binomial coefficients

elementary-number-theory prime-numbers binomial-coefficients asked Jul 14 '11 at 17:34

math.stackexchange.com

11 votes

Why an inconsistent formal system can prove everything?

logic proof-theory asked Sep 27 '10 at 12:37

math.stackexchange.com

Top Answers

Is it wrong to tell children that 1/0 = NaN is incorrect, and should be ∞?

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Zero to the zero power - Is $0^0=1$?

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Intuition behind “ideal”

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The graph of $x^{n}+y^{n}=r^{n}$ for sufficiently large $n$

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Boy Born on a Tuesday - is it just a language trick?

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Is there an efficient algorithm to determine the parity of the longest path in a graph?

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Every language is regular?

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Real world applications of prime numbers?

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Convert from DFA to NFA

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Types of infinity

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How many solutions possible for the equation $x_1+x_2+x_3+x_4+x_5=55$ if

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Why isn't it enough to enforce $w \in A \Rightarrow f(w) \in B$ before allowing a reduction from A to B?

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Probability that a coin lands on tails an odd number of times when it is tossed $100$ times

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Looking for a Drawing Program

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How can I prove $\sup(A+B)=\sup A+\sup B$ if $A+B=\{a+b\mid a\in A, b\in B\}$

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Mention 1 problem that is NP Hard but not NP Complete and why

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Why are differential equations called differential equations?

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every permutation is either even or odd,but not both

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“Hilbert foresaw the possibility of negative solutions to some mathematical problems”

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Gödel's Proof as a proof strategy for P = NP or P != NP

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Landmarks of subjects of mathematics

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Landmarks of subjects of mathematics

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Polynomial's coefficient

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How to define $-\infty$?

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The roots of $t^5+1$

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If a language is a NP-hard, is also its complement NP-hard?

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example for non-abelian group

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Counting 11 letter words with subword “FRED” - check my answer

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Why in Sieve of Erastothenes of $N$ number you need to check and cross out numbers up to $\sqrt{N}$? How it's proved?

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