1) The monogamous spousal function for all people, where unmarried people are treated as their own spouse.

The spouse, \\(s\\), of my spouse, \\(z_1\\) is me, \\(z_0\\).

2) The a mother, \\(a\\), of only children, \\(c\\), where \\(g\\) is the firstborn and \\(h\\) the last.