Tricki
a repository of mathematical know-how
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Algebra
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G
Group theory
L
Linear algebra
R
Ring theory
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C
Complete the square
H
How to determine whether a finitely presented group is finite
How to solve cubic and quartic equations
How to solve problems about discrete groups
How to solve problems about finite groups
I
I want to find a non-trivial solution to a system of equations
P
Properties of groups
R
Ring theory front page
T
To show that a group element is non-trivial, show that it has a non-trivial action or image
U
Use topology to study your group
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Recent articles
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Geometric view of Hölder's inequality
Diagonal arguments
Finding an interval for rational numbers with a high denominator
Try to prove a stronger result
Use self-similarity to get a limit from an inferior or superior limit.
Prove a consequence first
Lower degree by increasing dimension (or vice-versa)
Numerical optimization
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Higher dimensional analogues
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Angela, I think you missed
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covering a disc
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Only if squares are of the
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