TY - JOUR AU - P. Hu AU - I. Kriz AU - J. P. May TI - Cores of spaces, spectra, and $E_{\infty}$ ring spectra JO - Homology, homotopy, and applications PY - 2001 SP - 341 EP - 354 VL - 3 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4310/HHA.2001.v3.n2.a3/ DO - 10.4310/HHA.2001.v3.n2.a3 LA - en ID - HHA_2001_3_2_a4 ER -