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15
133
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A Problem on Euler's totient function.

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#elementary-number-theory #prime-numbers #gcd-and-lcm #totient-function
140
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$x+y-1$ divide $n$.

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#number-theory #elementary-number-theory #divisibility #gcd-and-lcm
62
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An identity of Riemann zeta function

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#sequences-and-series #number-theory #analytic-number-theory #gcd-and-lcm #riemann-zeta
63
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Prove that $gcd(u \times a, u \times b) = |u| \times gcd(a,b)$

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#integers #gcd-and-lcm
48
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Find GCD of two polynomials: $x^5 + 4x^4 + 3x^3 + x^2 + 4$ and $x^4 + 4x^3 + 4x^2 + 4$ in field $\mathbb{F}_3$ and in field $\mathbb{Q}$

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#polynomials #divisibility #factoring #gcd-and-lcm
41
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Method of finding "closest" common multiple?

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#statistics #gcd-and-lcm
502
Views

Finding HCF with the Euclidean Algorithm

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#gcd-and-lcm #euclidean-algorithm
76
Views

Determine the gcd of f(x) and f'(x)

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#algebra-precalculus #derivatives #gcd-and-lcm
278
Views

Show that $n | \sum_{k=1}^n m^{\textrm{gcd}(k, n)}$ where $n, m \geq 1$

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#arithmetic #integers #gcd-and-lcm
63
Views

Why are these numbers coprime?

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#elementary-number-theory #gcd-and-lcm #coprime
118
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Tips finding the gcd of $(n^2-3n-1, n-4)$

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#elementary-number-theory #gcd-and-lcm
39
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Curious short pattern in least common multiple of binomial coefficients

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#gcd-and-lcm #decimal-expansion #pattern-recognition
34
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Proof for $ax + by \equiv 0 \pmod c$ implies $x\equiv 0 \pmod c$ and $y\equiv 0 \pmod c$ when $a,b$ are co-prime

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#modular-arithmetic #solution-verification #gcd-and-lcm
155
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How does one calculate gcd of two numbers if they are not written in base 10, without converting it to base 10 and converting back?

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#arithmetic #gcd-and-lcm
115
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Turbo (uh, NOT!) method for calculating GCD?

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#number-theory #algorithms #examples-counterexamples #gcd-and-lcm

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