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zinking's user avatar
zinking
  • Member for 12 years, 8 months
  • Last seen more than 1 year ago
  • China
63 votes
3 answers
58k views

What is difference between a ring and a field?

7 votes
3 answers
15k views

fields are characterized by the property of having exactly 2 ideals [duplicate]

6 votes
1 answer
2k views

$n$-sheeted branched covering

5 votes
3 answers
8k views

what does "SU2 is homeomorphic to the unit 3-sphere in R4 " mean

2 votes
1 answer
3k views

Theorem: the icosahedral group is isomorphic to the alternating group $A_5$ , need more explain

2 votes
1 answer
3k views

The degree of splitting field of polynomial

2 votes
1 answer
98 views

sushi disk distance problem

2 votes
2 answers
498 views

category theory - what is the difference between morphism and arrow?

1 vote
1 answer
370 views

Sylow theorem and icosahedral group

0 votes
1 answer
201 views

What does the Galois group of polynomial $f$ mean?

0 votes
2 answers
392 views

how to determine the right side of the dice

0 votes
1 answer
54 views

why not cycle type of a permutation are just x 2 cycles?

0 votes
1 answer
582 views

Algebra - abstract symmetry - counting

0 votes
1 answer
131 views

how to understand minkowski's theorem

0 votes
1 answer
2k views

convert DNF to CNF for SAT solver

0 votes
1 answer
61 views

bayesian probability calculation

-1 votes
1 answer
519 views

how to prove Algebraic structure of the perfect shuffle