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.
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.

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