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their si equivalences and origins".
their si equivalences and origins".

also, the expected mathematical equivalences between the transformations no longer hold.
also, the expected mathematical equivalences between the transformations no longer hold.

sullivan wurde 1966 an der princeton university bei william browder promoviert ("triangulating homotopy equivalences").
his ph.d. thesis, entitled "triangulating homotopy equivalences", was written under the supervision of william browder, and was a contribution to surgery theory.

"substantial equivalence" focuses on the product rather than the production process.
"substantial equivalence" focuses on the product rather than the production process.