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Mathematics
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boyler
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5
Which one is correct? Don’t we do as necessary as rigorous math?
Jan 11, 2021
3
Can we have another set of inference rule which is simplier and equivalent (in the sense that they prove the same formulas)?
Nov 13, 2021
3
An orthonormal sequence in an inner product space converges weakly to $0$.
Jan 19
3
What are fun mathematical facts for non-mathematicians? [duplicate]
Jan 23
3
What are good sources for examples of field extensions?
Jun 10
2
How to converge to a bounded real sequence by a sequence of bounded sequences in $l^\infty$ using Banach limits? [duplicate]
Dec 12, 2021
2
How is it the case that: Any complete lattice is a Boolean algebra.
Apr 27, 2022
2
How to prove $\forall x\; (\phi (x)\land \psi (x) ) \rightarrow \forall x\; \psi (x)$ without using the completeness theorem?
May 15, 2022
2
Can we always find a complex polynomial which (together with its derivatives) satisfies given points?
Oct 21, 2022
2
Disproving the statement $\alpha\rightarrow\beta\models\forall x.\alpha\rightarrow\forall x.\beta$
Dec 9, 2021