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х =-1/t +1/(t-t0), | ( 3.1) |
х =-1/t -1/(t-t0), | (3.2) |
Рис. 1
t` = f1(t,x,y,z); x` = f2(t, x, y, z); y` = f3(t, x, y, z); z` = f4(t, x, y, z) |
(7.1) |
d2u/dx2 + d2u/dx2 + d2u/dx2 = a | (7.2) |
du/dx` = A11du/dx + A12du/dx+A13du/dx; du/dy` = A21du/dx + A22du/dx + A23du/dx; du/dz` = A31du/dx + A32du/dx + A33du/dx . |
(7.3) |