Report - B -> F 1« · n takes Bm X ¿„ to Bm+n and imbeds the complex [Bm,¿„] obtained by (1.1),, attaching Bm X An to Bm+„-y by the mapn\Bm_y xA„KJBm x A,.u into Bm+n as a subcomplex.

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