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␈↓ ↓H␈↓␈↓βS␈↓∧ Artificial Intelligence Laboratory, STANFORD UNIVERSITY, Stanford, California 94305

␈↓ ↓H␈↓∧Telephone 415 497-4430␈↓ 	↑February 28, 1979 




␈↓ ↓H␈↓Mr. Tang Chih-sung
␈↓ ↓H␈↓Institute of Computers
␈↓ ↓H␈↓Academia Sinica
␈↓ ↓H␈↓Peking, China

␈↓ ↓H␈↓Dear Mr. Tang:

␈↓ ↓H␈↓        Don␈α∂Knuth␈α∂and␈α⊂I␈α∂would␈α∂like␈α⊂to␈α∂know␈α∂if␈α∂you␈α⊂are␈α∂interested␈α∂in␈α⊂an␈α∂extended␈α∂visit␈α⊂to␈α∂the
␈↓ ↓H␈↓Computer␈α∩Science␈α∩Department␈α∩at␈α∩Stanford.␈α∩ We␈α∩both␈α∩remember␈α∩your␈α∩part␈α∩in␈α∩the␈α∩discussion
␈↓ ↓H␈↓following␈αour␈αlectures␈αat␈αthe␈αInstitute␈αof␈αComputing␈αMachines␈αin␈αPeking,␈αwere␈αimpressed␈αwith␈α
the
␈↓ ↓H␈↓understanding␈α⊂and␈α⊂thoughtfulness␈α⊂of␈α⊃your␈α⊂remarks,␈α⊂and␈α⊂we␈α⊂think␈α⊃that␈α⊂such␈α⊂a␈α⊂visit␈α⊃might␈α⊂be
␈↓ ↓H␈↓bene≡cial both to you and and our department.

␈↓ ↓H␈↓        If␈αyou␈αare␈α
interested␈αin␈αpursuing␈αthis␈α
possibility␈αfurther,␈αplease␈α
write␈αme␈αincluding␈αa␈α
resume
␈↓ ↓H␈↓and an indication of what scienti≡c problems you might like to work on at Stanford.

␈↓ ↓H␈↓        We␈αdon't␈αhave␈αa␈αde≡nite␈αplan␈αin␈αmind␈αat␈αpresent,␈αbut␈αif␈αyou␈αwant␈αto␈αcome,␈αwe␈αare␈αeager␈αto
␈↓ ↓H␈↓have you, and we will try to arrange something.


␈↓ ↓H␈↓Sincerely,



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

␈↓ ↓H␈↓cc: Professor Donald Knuth