User Xodarap

43 votes

Why are addition and multiplication commutative, but not exponentiation?

answered Apr 28, 2011 at 14:11

20 votes

Examples of falsified (or currently open) longstanding conjectures leading to large bodies of incorrect results.

answered Aug 21, 2013 at 19:04

13 votes

Accepted

Baby Rudin: Advice

answered Oct 15, 2011 at 20:19

6 votes

How to prove the error estimate of the Newton-iteration?

answered Dec 13, 2010 at 22:01

4 votes

How to Slice the Cheese

answered Oct 15, 2010 at 20:08

4 votes

What seemingly innocuous results in mathematics require advanced proofs?

answered Aug 18, 2017 at 16:42

4 votes

Accepted

Problem with understanding Cantor's diagonal argument

answered May 10, 2021 at 5:18

3 votes

What are the differences between these two logical statements?

answered Sep 20, 2012 at 16:47

3 votes

Accepted

Mathematical functions that can't be computed

answered Dec 14, 2010 at 2:32

3 votes

Propositional logic vs predicate logic: examples?

answered Feb 24, 2016 at 17:03

2 votes

What's the importance of the trig angle formulas?

answered Jul 31, 2013 at 16:38

2 votes

Accepted

What is a "prime implicent"?

answered Jan 24, 2016 at 19:21

2 votes

How far a lattice is from distributive/Boolean

answered May 27, 2016 at 19:35

2 votes

Lattices and Boolean algebra

answered Jun 2, 2016 at 20:06

2 votes

Accepted

Examples of semi-complements

answered Sep 14, 2016 at 21:45

2 votes

Motivating infinite series

answered Dec 17, 2010 at 23:22

2 votes

Motivating infinite series

answered Jan 5, 2011 at 2:14

2 votes

At what point does the Newton Raphson method fail to converge?

answered Jan 6, 2011 at 6:08

2 votes

Accepted

Knapsack with non-trivial "utility" function

answered Mar 16, 2012 at 0:28

2 votes

Looking for an algebraic structure

answered Sep 26, 2013 at 16:48

2 votes

Computing all simple paths in a distributive lattice in parallel.

answered Oct 2, 2013 at 16:32

2 votes

Accepted

Existence and uniqueness of particular binary operations on a lattice

answered Oct 15, 2013 at 17:32

2 votes

Identifying lattices

answered Nov 15, 2017 at 18:22

1 vote

What are some mathematically interesting computations involving matrices?

answered Aug 28, 2017 at 22:09

1 vote

"Great Theorems" references

answered May 18, 2013 at 14:53

1 vote

Resource allocation with minimal differences

answered Jun 21, 2013 at 16:44

1 vote

Calculating conditional entropy given two random variables

answered Jul 8, 2012 at 19:34

1 vote

how to translate a sentence into a quantifier?

answered Mar 4, 2011 at 19:53

1 vote

Solutions to interesting problems with elegant and unintuitive methods

answered Mar 11, 2011 at 23:13

1 vote

Accepted

Prove the $C(A) = l(u(a))$ is a closure operator on $A$

answered Sep 27, 2016 at 16:32

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45 Answers

Why are addition and multiplication commutative, but not exponentiation?

Examples of falsified (or currently open) longstanding conjectures leading to large bodies of incorrect results.

Baby Rudin: Advice

How to prove the error estimate of the Newton-iteration?

How to Slice the Cheese

What seemingly innocuous results in mathematics require advanced proofs?

Problem with understanding Cantor's diagonal argument

What are the differences between these two logical statements?

Mathematical functions that can't be computed

Propositional logic vs predicate logic: examples?

What's the importance of the trig angle formulas?

What is a "prime implicent"?

How far a lattice is from distributive/Boolean

Lattices and Boolean algebra

Examples of semi-complements

Motivating infinite series

Motivating infinite series

At what point does the Newton Raphson method fail to converge?

Knapsack with non-trivial "utility" function

Looking for an algebraic structure

Computing all simple paths in a distributive lattice in parallel.

Existence and uniqueness of particular binary operations on a lattice

Identifying lattices

What are some mathematically interesting computations involving matrices?

"Great Theorems" references

Resource allocation with minimal differences

Calculating conditional entropy given two random variables

how to translate a sentence into a quantifier?

Solutions to interesting problems with elegant and unintuitive methods

Prove the $C(A) = l(u(a))$ is a closure operator on $A$