which scientist is known for the hellinger–toeplitz theorem and the silverman–toeplitz theorem ?
select distinct var_uri where brack_open var_uri dbo_knownFor dbr_Hellinger–Toeplitz_theorem sep_dot var_uri rdf_type dbo_Scientist sep_dot var_uri dbo_knownFor dbr_Silverman–Toeplitz_theorem sep_dot brack_close