On Left (N, U)-Coherent Dimensions of Rings
Received:August 13, 2001  
Key Words: （N   U）-finitely generated module   n-N-U-finitely presented module   left （N   U）-coherent dimension.  
Fund Project:Research supported by National Natural Science Foundation of China (10171082)and by the Teaching and Research Award Program for Outstanding Young Teach ers in Higher Education Institutions of MOE.
Author NameAffiliation
LIU Zhong-kui Dept. of Math.
Northwest Normal University
Lanzhou
China 
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Abstract:
      Let R, S be rings, U a flat right .R-rnodule and V a flat right S-module. We show in this paper that (N, (U, V))-lc.dim(R⊕S) = sup((N, U)-lc.dimR, (N, V)-lc.dimS).
Citation:
DOI:10.3770/j.issn:1000-341X.2004.01.015
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