# Landau-Ramanujan constant

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## English[edit]

### Etymology[edit]

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

### Proper noun[edit]

- (number theory) 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