2017-04-01

	added /3, a distributed version, corresponding to what's in JR book
	and also what I need for extended CO stmt.

	in doing so I discovered [after hours of debugging ;-(] a bug
	in /1/jacobi.jr and /2/jacobi.jr
	which I had used for 3/

        this.xt = xb;

	UGH.

	fixed it, but since 1/ and 2/ did no output (for reasons I
	don't recall),
	made no difference in No_input.std.
