Kernels and Cubes
Kernel: cube-free factor of an expression (no cube can factor it evenly)
- No literal appears in every term kernels: a + b, a + cd non-kernels: a, abc, ac + abd
Co-kernel: quotient resulting from dividing the expression by the kernel e.g., F = a c + b c + b’ d’ kernels: a + b co-kernels: c G = (a + b + c) (d + e) f + g kernels: a + b + c; d + e co-kernels: de, df; af, bf, cf