#672 (Jan 5, 2017, 9:02:05 AM)

1. tuned NEWS (detail / hgweb)
2. reworked to provide auxiliary operations Euclidean_Algorithm.* to instantiate gcd etc. for euclidean rings (detail / hgweb)
3. moved euclidean ring to HOL (detail / hgweb)
4. reshaped euclidean semiring into hierarchy of euclidean semirings culminating in uniquely determined euclidean divion (detail / hgweb)

Started by an SCM change

This run spent:

• 5 min 3 sec waiting;
• 1 hr 31 min build duration;
• 1 hr 36 min total from scheduled to completion.