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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305
␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	↑February 10, 1976




␈↓ ↓H␈↓Dr. Leon Knopo≥
␈↓ ↓H␈↓Department of Geophysics
␈↓ ↓H␈↓University of California
␈↓ ↓H␈↓Los Angeles, California 90024

␈↓ ↓H␈↓Dear Leon:

␈↓ ↓H␈↓Thanks␈α
for␈α
your␈α
invitation␈α
to␈αthe␈α
Eleventh␈α
International␈α
Symposium␈α
of␈αMathematical␈α
Geophysics,
␈↓ ↓H␈↓but I am sorry, I don't have time.


␈↓ ↓H␈↓Sincerely,



␈↓ ↓H␈↓John McCarthy
␈↓ ↓H␈↓Director
␈↓ ↓H␈↓Professor of Computer Science


␈↓ ↓H␈↓cc: Prof. Karl Fuchs