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15
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Why $[3,-1]$ is $-3$?

Published on
#elementary-number-theory #definition #integers #least-common-multiple
327
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Find primitive-$n$-th roots of unity over finite field $\mathbb{F}_a$??

Published on
#polynomials #finite-fields #integers #primitive-roots
233
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What does $\mathbb{Z}_3$ mean?

Published on
#integers
144
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Inverse power-of-two in binary representation - how to calculate quickly?

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#discrete-mathematics #integers
1.2k
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A curious sequence (Ascending and descending a staircase)

Published on
#sequences-and-series #puzzle #integers
113
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Show that any solution $\varphi$ of $y' + (\cos x)y = e^{-\sin(x)}$ has the property that $\varphi(\pi k) - \varphi(0) = \pi k, k \in \mathbb {Z}$

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#integration #ordinary-differential-equations #integers
106
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Find all integers $k$ such that $\frac{k^4+k^3-5k^2+k}{k^2+k-6}$ is an integer.

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#elementary-number-theory #integers
145
Views

How to prove this lemma related to iterated function?

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#algebra-precalculus #polynomials #contest-math #integers
109
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What is the smallest integer $n$ for which both $\pi n$ and $e n$ are within $1/10000$ of an integer?

Published on
#exponential-function #integers #pi
44
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Problem related to divisors

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#integers #gcd-and-lcm
67
Views

How to go about proof involving integers

Published on
#integers
582
Views

A minimum value proof

Published on
#inequality #integers
55
Views

Roots of square equation, the solution for the value of element K in a series of numbers

Published on
#sequences-and-series #radicals #integers
76
Views

How to show that if $9n^2=a^2+b^2$, $a$ and $b$ are multiples of $3$

Published on
#elementary-number-theory #equivalence-relations #integers
91
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Which integers $k$ give $b=ka$?

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#linear-algebra #number-theory #elementary-number-theory #recreational-mathematics #integers

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