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.

soft-question math-history big-list conjectures

answered Aug 21, 2013 at 19:04

12 votes

Accepted

Baby Rudin: Advice

analysis self-learning

answered Oct 15, 2011 at 20:19

6 votes

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

analysis numerical-methods

answered Dec 13, 2010 at 22:01

4 votes

What seemingly innocuous results in mathematics require advanced proofs?

soft-question big-list

answered Aug 18, 2017 at 16:42

4 votes

Accepted

Problem with understanding Cantor's diagonal argument

elementary-set-theory real-numbers infinity

answered May 10, 2021 at 5:18

3 votes

What are the differences between these two logical statements?

logic

answered Sep 20, 2012 at 16:47

3 votes

Accepted

Mathematical functions that can't be computed

combinatorics

answered Dec 14, 2010 at 2:32

2 votes

Motivating infinite series

calculus sequences-and-series education

answered Dec 17, 2010 at 23:22

2 votes

Motivating infinite series

calculus sequences-and-series education

answered Jan 5, 2011 at 2:14

2 votes

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

numerical-methods

answered Jan 6, 2011 at 6:08

2 votes

How to Slice the Cheese

combinatorics recurrence-relations

answered Oct 15, 2010 at 20:08

2 votes

Accepted

Knapsack with non-trivial "utility" function

computer-science computational-complexity utility

answered Mar 16, 2012 at 0:28

2 votes

Computing all simple paths in a distributive lattice in parallel.

combinatorics graph-theory computer-science lattice-orders

answered Oct 2, 2013 at 16:32

2 votes

Lattices and Boolean algebra

discrete-mathematics divisibility order-theory lattice-orders

answered Jun 2, 2016 at 20:06

2 votes

What's the importance of the trig angle formulas?

trigonometry

answered Jul 31, 2013 at 16:38

2 votes

Accepted

What is a "prime implicent"?

logic

answered Jan 24, 2016 at 19:21

2 votes

Propositional logic vs predicate logic: examples?

logic examples-counterexamples propositional-calculus predicate-logic first-order-logic

answered Feb 24, 2016 at 17:03

1 vote

Name for a "layered" type of partial order?

terminology order-theory

answered Apr 16, 2016 at 16:11

1 vote

Distributive subgroups lattice

group-theory finite-groups lattice-orders

answered Apr 15, 2016 at 0:07

1 vote

How far a lattice is from distributive/Boolean

lattice-orders

answered May 27, 2016 at 19:35

1 vote

Looking for an algebraic structure

abstract-algebra terminology boolean-algebra lattice-orders

answered Sep 26, 2013 at 16:48

1 vote

Introductions to posets on algerbaic structures (Everything I need to know about them)

abstract-algebra reference-request order-theory big-list trees

answered May 15, 2014 at 16:58

1 vote

Accepted

Is this subgroup of an $\ell$-group closed under this operation?

group-theory lattice-orders

answered Aug 25, 2016 at 14:20

1 vote

Accepted

Examples of semi-complements

examples-counterexamples boolean-algebra lattice-orders

answered Sep 14, 2016 at 21:45

1 vote

Accepted

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

lattice-orders universal-algebra

answered Sep 27, 2016 at 16:32

1 vote

Identifying lattices

lattice-orders

answered Nov 15, 2017 at 18:22

1 vote

What are some mathematically interesting computations involving matrices?

linear-algebra sequences-and-series matrices discrete-mathematics big-list

answered Aug 28, 2017 at 22:09

1 vote

Accepted

Existence and uniqueness of particular binary operations on a lattice

lattice-orders

answered Oct 15, 2013 at 17:32

1 vote

Accepted

Can all non-archimedean groups be written as a product of archimedean groups?

abstract-algebra group-theory order-theory lattice-orders ordered-groups

answered Sep 22, 2014 at 13:47

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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?

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

Motivating infinite series

Motivating infinite series

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

How to Slice the Cheese

Knapsack with non-trivial "utility" function

Computing all simple paths in a distributive lattice in parallel.

Lattices and Boolean algebra

What's the importance of the trig angle formulas?

What is a "prime implicent"?

Propositional logic vs predicate logic: examples?

Name for a "layered" type of partial order?

Distributive subgroups lattice

How far a lattice is from distributive/Boolean

Looking for an algebraic structure

Introductions to posets on algerbaic structures (Everything I need to know about them)

Is this subgroup of an $\ell$-group closed under this operation?

Examples of semi-complements

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

Identifying lattices

What are some mathematically interesting computations involving matrices?

Existence and uniqueness of particular binary operations on a lattice

Can all non-archimedean groups be written as a product of archimedean groups?