xlisten

Now proof of Ord_jump_cardinal uses
ordertype_pred_unfold; proof of sum_0_eqpoll uses bij_0_sum; proof of
sum_0_eqpoll uses sum_prod_distrib_bij; proof of sum_assoc_eqpoll uses
sum_assoc_bij; proof of prod_assoc_eqpoll uses prod_assoc_bij. Proved
well_ord_cadd_cmult_distrib.

#! /bin/sh
#  xlisten -- start a program in one window and create a listener window
#     environment variable $LISTEN specifies the file name

#create the file!
date > $LISTEN

xterm -geo 80x10+0+0 -T Listener -n Listener -e tail -f $LISTEN &
sleep 2
xterm -geo 80x45+0-0 -e teeinput $* &