# Landau-Ramanujan constant

> English word · Proper noun

## Definitions
1. The constant of proportionality (approximately 0.7642) in the relationship between the number of positive integers less than x that are the sum of two square numbers, for large x, and the expression x/√.

## Etymology
After its two independent discoverers, Edmund Landau and Srinivasa Ramanujan.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/landau-ramanujan-constant