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16h
reviewed Leave Open Number of 11-digit length number with all 10 digits and no consecutive same digits
16h
reviewed Close Prove a certain function is discontinuity type I and integrable.
17h
reviewed Looks OK Am I using the chain rule correctly?
17h
reviewed Close How to calculate powers of a permutation in cyclic notation?
17h
reviewed Looks OK Is the sum of a unimodal and increasing function still unimodal?
1d
reviewed Looks OK After switching a lamp on and off infinitely many times in one minute, is it on or off?
1d
reviewed Leave Closed prove function is well-defined and integrable
1d
reviewed Close Throwing a ball upright in the Air
1d
reviewed Close what is the fundamental group of a torus with $k$ points removed
1d
reviewed Close Proof that $\sqrt{3} \notin \mathbb{Q}(\theta)$ where $\theta^4-2=0$.
1d
reviewed Close If $A$ is a $3\times3$ Matrics Then $\left |(2A)^{-1} \right |=?$
1d
reviewed Close Help me to better understanding of this two pages of Folland's Harmonic Analysis book
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awarded  Enlightened
1d
awarded  Nice Answer
1d
reviewed Close Prove that to any three numbers positive integers
1d
reviewed Close Why does this hyperboloid change into a surface?
1d
reviewed Close How to show remaining time in timer clock matlab on pressing ESC?
1d
reviewed Close Differentiability of polynomials
1d
reviewed Reopen Which slope is greater: one going very slightly downward, or one going quite steeply downward?
1d
comment Choosing the right sign for inverse functions?
The range of the inverse function is the domain of the original function.