A method of solving boundary value problems of irrotational gas flow by means of digital computers

Koga, Toyoki (1912- ). A method of solving boundary value problems of irrotational gas flow by means of digital computers. Dittoed typescript. N.p., n.d. [ca. 1956]. Unbound. [1], 11ff. 281 x 218 mm. Provenance: Theodore von K rm n. Koga's presentation inscription to Theodore von K rm n on the title-leaf: "To Professor T. von K rm n with the author's best compliments. Toyoki Koga." Small rust-mark from paperclip, a few spots. "A method of solving boundary value problems of gas flow where sub-sonic, sonic and super-sonic areas appear simultaneously is proposed. Being given a stream line and the state on it, the coordinates of the neighboring second stream line and its state are calculated according to the fundamental equations of gas flow. . . . By means of modern digital computers, we may easily obtain results of sufficient accuracy" (first leaf). Contrast this approach with the solution to a related problem presented thirteen years earlier in item by Kormes. Origins of Cyberspace 755.