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math.DG2006
Natural differential operators and graph complexes
Martin Markl
We show how the machine of PROP profiles invented by S. Merkulov can be used to study and classify natural operators in differential geometry. We also give an interpretation of gra…
math.AT2006
Operads and PROPs
Martin Markl
We review definitions and basic properties of operads, PROPs and algebras over these structures.