text: An equation named for this man can be obtained from the Klimontovich equation using an ensembleaverage over particles and no collisions, and that equation further simplifies to the Vlasov equation inplasmas.
full_question: An equation named for this man can be obtained from the Klimontovich equation using an ensembleaverage over particles and no collisions, and that equation further simplifies to the Vlasov equation inplasmas. A second equation named for this man integrates the probability log probability over all space,assumes molecular chaos before collisions but not afterward, and violates time reversal symmetry. A third ofhis equations takes the logarithm of the number of permutations of the available thermodynamic states,which is symbolized W. This namesake of a transport theorem and an H-theorem had that third equationwritten on his tombstone. For 10 points, name this Austrian whose namesake constant, symbolized k, is usedto calculate entropy. 
first_sentence: An equation named for this man can be obtained from the Klimontovich equation using an ensembleaverage over particles and no collisions, and that equation further simplifies to the Vlasov equation inplasmas.
raw_answer: Ludwig Boltzmann 