67     T			xy, xz, yz, yx, zx, zy;
271     xy = xz = yz = yx = zx = zy = 0;  in Shear6()
281     yx = 0;  in Shear6()
293     yx = 0;  in Shear6()
306     yx = 0;  in Shear6()
318     yx = YX;  in Shear6()
330     yx = h.yx;  in Shear6()
343     yx = T (h.yx);  in Shear6()
355     yx = h.yx;
369     yx = 0;
383     yx = T (YX);  in setValue()
396     yx = T (h.yx);  in setValue()
409     YX = S (yx);  in getValue()
422     h.yx = S (yx);  in getValue()
447        yx == h.yx  &&  zx == h.zx  &&  zy == h.zy;
456        yx != h.yx  ||  zx != h.zx  ||  zy != h.zy;
489     yx += h.yx;
500            yx + h.yx, zx + h.zx, zy + h.zy);
510     yx -= h.yx;
521            yx - h.yx, zx - h.zx, zy - h.zy);
528     return Shear6 (-xy, -xz, -yz, -yx, -zx, -zy);
538     yx = -yx;  in negate()
551     yx *= h.yx;
564     yx *= a;
575            yx * h.yx, zx * h.zx, zy * h.zy);
583            yx * a, zx * a, zy * a);
593     yx /= h.yx;
606     yx /= a;
617            yx / h.yx, zx / h.zx, zy / h.zy);
625            yx / a, zx / a, zy / a);
639          << h.yx << ' ' << h.zx << ' ' << h.zy
653               a * h.yx, a * h.zx, a * h.zy);