Boundary value problems (BVPs) and partial differential equations (PDEs) are critical components of modern applied mathematics, underpinning the theoretical and practical analyses of complex systems.

SBOX = [0xe, 0x4, 0xd, 0x1, 0x2, 0xf, 0xb, 0x8, 0x3, 0xa, 0x6, 0xc, 0x5, 0x9, 0x0, 0x7] PBOX = [0x0, 0x4, 0x8, 0xc, 0x1, 0x5, 0x9, 0xd, 0x2, 0x6, 0xa, 0xe, 0x3, 0x7 ...