In the past two weeks I posted on the arXiv two very different papers. One is in Discrete Geometry (joint with Karim Adiprasito) and another is in Asymptotic Group Theory (joint with Martin Kassabov). Both are fundamentally combinatorial, resolve (or at least advance) some rather old open...
Thus studies of Permian deposits from their type localities suggest that the interval between the Artinskian and Kazanian stages may conveni- ently be regarded as a single stage, comparable with the Svalbardian o f the Boreal paleogeographic province , PERMIAN-TRIASSIC RELATIONSHIPS AND FAUNAL ...
Bordering the Aral basin to the south-east are massive mountain systems that almost split the Eurasian continent in two. They have a profound effect on the geography, climate, and agriculture of Karakalpakstan. The valley of the Hari'rud, linking Turkmenistan to Afghanistan, marks the beginning ...