Grigory Merzon,
MCCME, Kvantik, HSE
http://dev.mccme.ru/~merzon/
The article "Areas of Polygons and Melting Ice" was published in the journal
"Kvantik" (https://kvantik.com/) No. 9 for 2018.
This proof of Pick's formula was invented by Christian Blatter ("Another
proof of Pick's area theorem", Math. Magazine, 1997, Vol. 70, No. 3, P.
200).
There is a (more complex) article about the multidimensional version of Pick's formula
"Integer Points in Polygons and Polyhedra" (Mat. Prosv., Ser.
3, Issue 25, pp. 110–122; http://mi.mathnet.ru/mp961).
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