Podcast #128: We chat with Kent C Dodds about why he loves React and discuss what life was like in the dark days before Git. Listen now.

# Questions tagged [mathematics]

For code that aims to solve problems in all branches of mathematics. (Please do NOT use this tag for incidental trivial use of arithmetic. A simple test to apply is: would an amateur or professional mathematician take an interest in the question?)

439 questions
Filter by
Sorted by
Tagged with
55 views

8k views

### Better implementation of Gaussian Elimination

I made an algorithm in C# that solves any system of linear equations using the Gaussian elimination. There are 2 text boxes in the program for input and output. Input is in the format of the ...
42 views

### Modular multiplicative inverse in Ruby

I implemented an algorithm to find the modular multiplicative inverse of an integer. The code works, but it is too slow and I don't know why. I compared it with an algorithm I found in Rosetta Code, ...
743 views

### Find smallest number of squares that sum to a number

Leetcode problem 279 “Perfect Squares” is: Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) I wrote the following solution: ...
81 views

### Sum of number's quotients when divided by exact powers of 2

Problem I have written code to solve this challenge: Given a formula: GCD(x,y) means the GCD (Greatest Common Divisor) of x and y. For example: if N=2, then: f(2) = 1/GCD(1,...
279 views

### Computing a Discrete Cosine Transform matrix

I'm learning Haskell and I needed to work with discrete cosine transform matrices, so I made a program that generates text (usable in WolframAlpha) containing the generated matrix. The elements of ...
110 views

### PHP find cheapest permutation

I have multiple products that all have sizes and I need to find the cheapest configuration that meets the minimum required size. For example, John needs a minimum of 10 litres of storage - it can be ...
238 views

### Reverse int within the 32-bit signed integer range: $[−2^{31}, 2^{31} − 1]$ Optimized

LeetCode Problem Reverse digits of a 32-bit signed integer. When the reversed integer overflows return 0. Feedback Optimized from beta code in the original question here. Based on this LeetCode ...
92 views

### Shutting down all lamps with minimum number of switch presses

I found an optimization problem written in Finnish but I will translate it into English. The following is an example case. I have $n=120$ lamps in a circle, and enumerated by $L_1,…,L_{120}$. ...