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Sushil
  • Member for 9 years, 6 months
  • Last seen more than a week ago
13 votes
2 answers
3k views

GCD domain is LCM domain [duplicate]

11 votes
2 answers
914 views

Semigroups and solutions of equation

9 votes
3 answers
8k views

Example of Hausdorff and Second Countable Space that is Not Metrizable

7 votes
2 answers
678 views

Product of non-normal subgroups equals the whole group

7 votes
1 answer
2k views

Hamel Basis in Infinite dimensional Banach Space without Baire Category Theorem

5 votes
2 answers
542 views

An example for infinite dimensional vector space with Hamel dimension smaller than $\operatorname{card} F$

5 votes
1 answer
371 views

Formal proof of $(A\lor B)∨C \leftrightarrow A\lor(B\lor C)$

5 votes
1 answer
1k views

$M$ maximal in a ring $R$, what is $R/M$?

5 votes
6 answers
459 views

Calculation of limit without stirling approximation

5 votes
0 answers
107 views

Semigroup satisfying the cancellation property which cannot be embedded in a group [duplicate]

4 votes
2 answers
758 views

Ring with many one-sided zero-divisors

4 votes
2 answers
2k views

Collection of all finite sets

4 votes
1 answer
306 views

Can every vector space (over $\mathbb{R}$ or $\mathbb{C}$) can be a Banach space (or Hilbert space)?

4 votes
2 answers
3k views

In a ring with unity, does prime imply irreducible?

4 votes
1 answer
300 views

A Banach space of (Hamel) dimension $\kappa$ exists if and only if $\kappa^{\aleph_0}=\kappa$

3 votes
1 answer
191 views

Hilbert space and uncountable cardinal

3 votes
1 answer
436 views

Extension of measure to non measurable sets

3 votes
1 answer
90 views

Solution of the functional equation $f(x)+f\left(\frac 1 x\right) = f(x)f\left(\frac 1 x\right)$

3 votes
1 answer
338 views

Relation between consistency of ZF, MK and NBG

3 votes
2 answers
3k views

Algebra generated by a collection of subsets of a set X

3 votes
1 answer
253 views

Disconnected Topoological Space with Intermediate Value Property

3 votes
1 answer
264 views

Non Archimedean field

3 votes
2 answers
4k views

Countable union of countable sets is countable and AC (or axiom of countable choice)

3 votes
1 answer
515 views

Cyclic group generator and multiplicative identity of correspondng ring

3 votes
1 answer
359 views

Can every group be extended to ring with idenity [duplicate]

3 votes
3 answers
240 views

Ordered field and all Cauchy sequence eventually constant

3 votes
0 answers
87 views

Counterexamples for Banach *-algebras

2 votes
1 answer
168 views

Power sequence in matrices

2 votes
1 answer
105 views

A question about elements of sets

2 votes
1 answer
89 views

Every finite Set as non-abelian Group

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