Yes. I wanna expand on this point in case someone is interested. Actually he just said that in passing but there were works by Kontsevich, Soibelman in one paper and Joyce, Song in another paper. Sen derived two wall crossing formulas in a paper with Manschot and Pioline and later in another paper, he showed that the formulas that he derived do match with earlier works of the people mentioned above. Here is a small description of what the wall crossing formula describes. It was known that if you continuously change the parameters of supergravity theory, then the degeneracy (number of states) of multicenter black holes (black hole states that are made up of more than black hole... such a thing can happen in supergravity) doesn’t change. However, in the parameter space, there exist some walls which are called ‘walls of marginal stability’. If you change the parameters of the theory such that these walls are crossed, then the degeneracy of the multicenter black holes jumps from one value to another. The wall crossing formula tells you the amount by which this degeneracy jumps.
Background sound destroyed whole video 😡😡
Please avoid adding background music for at least interviews.....
😏People getting disturbed by backgrd music, me who focussed on each word of Dr. Ashok sen, couldn't even realise there's bckgrnd music
Beautiful music...I can almost hear him.
"kontsevich soibelman wall crossing formula"
Yes. I wanna expand on this point in case someone is interested.
Actually he just said that in passing but there were works by Kontsevich, Soibelman in one paper and Joyce, Song in another paper. Sen derived two wall crossing formulas in a paper with Manschot and Pioline and later in another paper, he showed that the formulas that he derived do match with earlier works of the people mentioned above.
Here is a small description of what the wall crossing formula describes.
It was known that if you continuously change the parameters of supergravity theory, then the degeneracy (number of states) of multicenter black holes (black hole states that are made up of more than black hole... such a thing can happen in supergravity) doesn’t change. However, in the parameter space, there exist some walls which are called ‘walls of marginal stability’. If you change the parameters of the theory such that these walls are crossed, then the degeneracy of the multicenter black holes jumps from one value to another. The wall crossing formula tells you the amount by which this degeneracy jumps.
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Thnks
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You guys should remove the background music