On whose memorial tomb is the famous equation ‘S=klnΩ’ written?

Ludwig Eduard Boltzmann was an Austrian physicist and philosopher whose greatest achievement was the development of statistical thermodynamics. The formula S=klnΩ engraved on his memorial tombstone connects entropy with the natural logarithm of thermodynamic probability. The proportionality constant k is called the Boltzmann’s constant. He committed suicide on 5 September 1906.