Landau-Ramanujan constant

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

Proper noun[edit]

Landau-Ramanujan constant

  1. (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