... satisfy the hypotheses(SL1, , 4) of the Strong Main Lemma for ¯A, with a constant determinedA SHARP FORM OF WHITNEY’S EXTENSION THEOREM525by C, m, n in (WL1, , 4). In fact, (SL1) for the¯Pαis ... A, m, n.(8)Annals of Mathematics A sharp form of Whitney’s extension theorem By Charles L. Fefferman A SHARP FORM OF WHITNEY’S EXTENSION THEOREM527From (1), ,(5), we conclude ... involving A.Weak Main Lemma for A. Given m, n ≥ 1, there exist constantsk#,a0, depending only on m and n, for which the following holds. Suppose weA SHARP FORM OF WHITNEY’S EXTENSION THEOREM519are...