List questions from modular-arithmetic

Published on 19 Aug 2019 - 9:14

110

Views

Providing divisibility condition given fraction identity

Published on 26 Mar 2026 - 6:20

135

Views

Showing equivalence in modular arithmetic

Published on 19 Aug 2019 - 16:23

159

Views

What is the period of geometric series sums in modular arithmetics?

Published on 27 Mar 2026 - 2:37

81

Views

Elements squaring to zero form an ideal in $\mathbf{Z}/n\mathbf{Z}$

Published on 25 Mar 2026 - 17:52

165

Views

Generalization of digit-wise divisibility lemmas

Published on 21 Aug 2019 - 1:17

2k

Views

If $a^{2} + b^{2} = c^{2}$ then show that $ 3 | ab $

Published on 31 Mar 2026 - 22:25

53

Views

Showing a function $\Bbb Z/5\to\Bbb Z/5$ is surjective

Published on 21 Aug 2019 - 13:33

232

Views

Prime $p$ with $p^2=3m^2+1$ and $p\equiv 1 \mod 4$

Published on 29 Mar 2026 - 6:08

99

Views

Formal proofs for $f_p(a \cdot b) = f_p(a) + f_p(b) \mod p $?

Published on 23 Feb 2026 - 4:57

37

Views

How to show that $(a \text{ } mod \text{ } m)^2 \text{ } mod \text{ } m = a^2 \text{ } mod \text{ } m$?

Published on 22 Aug 2019 - 2:25

60

Views

Reasoning about combinations of distinct modular classes of $5$ and $7$

Published on 22 Aug 2019 - 2:46

973

Views

How can calculate $ a \mod n^2 $ be computed smartly if we know $a \mod n$?

Published on 22 Aug 2019 - 17:17

59

Views

Is it possible to calculate x having all other information in ((x^3)+5) mod p where p is a known large prime?

Published on 22 Aug 2019 - 18:46

2.7k

Views

Using the Euclidean Algorithm how to find the inverse of 41 in Z(131)

Published on 25 Mar 2026 - 21:48

List Question

Show that $Q(Q(Q(2005^{2005})))=7$

Providing divisibility condition given fraction identity

Showing equivalence in modular arithmetic

What is the period of geometric series sums in modular arithmetics?

Elements squaring to zero form an ideal in $\mathbf{Z}/n\mathbf{Z}$

Generalization of digit-wise divisibility lemmas

If $a^{2} + b^{2} = c^{2}$ then show that $ 3 | ab $

Showing a function $\Bbb Z/5\to\Bbb Z/5$ is surjective

Prime $p$ with $p^2=3m^2+1$ and $p\equiv 1 \mod 4$

Formal proofs for $f_p(a \cdot b) = f_p(a) + f_p(b) \mod p $?

How to show that $(a \text{ } mod \text{ } m)^2 \text{ } mod \text{ } m = a^2 \text{ } mod \text{ } m$?

Reasoning about combinations of distinct modular classes of $5$ and $7$

How can calculate $ a \mod n^2 $ be computed smartly if we know $a \mod n$?

Is it possible to calculate x having all other information in ((x^3)+5) mod p where p is a known large prime?

Using the Euclidean Algorithm how to find the inverse of 41 in Z(131)

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