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  • Member for 8 years, 11 months
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74 votes

Sum of all natural numbers is 0?

30 votes

1, 5, 9, 13, 17, 21,...

30 votes

Is taking modulus on both sides of an equation valid?

22 votes

can real line be written as a disjoint unions of set with cardinality 5

19 votes
Accepted

When, where and **how often** do you find polynomials of higher degrees than two in mathematical, pure/applied, research?

18 votes

Non-distributive fields?

15 votes
Accepted

How can the probability that a number contains the digit 3 be 1?

15 votes
Accepted

Equivalence of two expressions for the Weeks manifold hyperbolic volume

14 votes
Accepted

Eigenvalues of a Complete graph

13 votes
Accepted

Bijective map from $\Bbb Z$ to $\Bbb Q$

11 votes
Accepted

Does a cover have to be infinite

11 votes

How do I find parity check matrix if generator matrix can't be written in standard form?

10 votes
Accepted

True statement with a false contrapositive?

10 votes

Proving that if $AB=A$ and $BA=B$, then both matrices are idempotent

9 votes

Equivalence class plain English

8 votes

Abusing mathematical notation, are these examples of abuse?

8 votes
Accepted

Meaning of this exercise in group theory

8 votes
Accepted

Understanding an Algebra over a Field

8 votes

Matrix with the same value in all entries — which notation to use?

8 votes
Accepted

Is the factorization of a polynomial the same over any algebraically closed field?

7 votes
Accepted

Meaning of "extension field is a vector space"

7 votes

Eigenvalues without any calculations

7 votes
Accepted

What is the point of isomorphism concept?

7 votes
Accepted

Why crypto algorithms are primarily based on finite fields?

7 votes
Accepted

how to make a $3$-$(10,4,1)$ design using graphs

7 votes

The affine special linear group acts doubly transitive

7 votes

A proper definition of $i$, the imaginary unit

7 votes
Accepted

Are $B=PAP^{-1}$ and $B=P^{-1}AP$ equivalent?

7 votes

What is $0\div0\cdot0$?

6 votes

Operation that makes the negative real numbers, $\mathbb{R}_{<0}$, a group

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