paulson <lp15@cam.ac.uk> [Thu, 05 Jan 2017 16:03:23 +0000] rev 64790
New theory of arcwise connected sets and other new material
paulson <lp15@cam.ac.uk> [Thu, 05 Jan 2017 15:03:37 +0000] rev 64789
connectedness, circles not simply connected , punctured universe
paulson <lp15@cam.ac.uk> [Thu, 05 Jan 2017 14:18:24 +0000] rev 64788
New material about path connectedness, etc.
haftmann [Wed, 04 Jan 2017 21:28:33 +0100] rev 64787
tuned NEWS
haftmann [Wed, 04 Jan 2017 21:28:29 +0100] rev 64786
reworked to provide auxiliary operations Euclidean_Algorithm.* to instantiate gcd etc. for euclidean rings
haftmann [Wed, 04 Jan 2017 21:28:29 +0100] rev 64785
moved euclidean ring to HOL
haftmann [Wed, 04 Jan 2017 21:28:28 +0100] rev 64784
reshaped euclidean semiring into hierarchy of euclidean semirings culminating in uniquely determined euclidean divion