INVARIANCE AND NONINVARIANCE IN THE LATTICE OF $\Pi_1^0$ CLASSES
CHOLAK, PETER A., DOWNEY, RODVolume:
70
Language:
english
Journal:
Journal of the London Mathematical Society
DOI:
10.1112/S0024610704005824
Date:
December, 2004
File:
PDF, 200 KB
english, 2004