Late reply, but Gelfand's geometry textbook was published [0] in 2020. I think it was completed by his colleagues after his death in 2009. The calculus [1] and

Late reply, but Gelfand's geometry textbook was published [0] in 2020. I think it was completed by his colleagues after his death in 2009. The calculus [1] and combinatorics [2] books are also in print. [0] https://www.springer.com/gp/book/9781071602973 https://www.springer.com/gp/book/9781071602973 [1] https://store.doverpublications.com/0486414485.html https://store.doverpublications.com/0486414485.html [2] https://store.doverpublications.com/0486425665.html https://store.doverpublications.com/0486425665.html