Two mathematicians now say they’ve made progress on a very old unsolved math problem. The problem involves a subfield called geometric measure theory, in which sets of objects a ...

School of Physics and Technology, Wuhan University, Wuhan 430072, China Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, ...

The angle of elevation of the top of 24 m high Kaveri tower from the foot of Ganga tower is 60˚.The angle of elevation of top of Ganga tower from the foot of Kaveri tower is 30˚. What is the ...