熔岩
发表于 2025-3-28 15:50:04
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变色龙
发表于 2025-3-28 20:41:30
Infinite Numerical and Functional Seriesrms ... Here .. is a general (we say “the .-th”) term of the series which is constructed via a some kind of formula depending on an integer . = 1, 2, 3, .. For instance, the rule . with . = 0, 1, 2, 3, . corresponds to an infinite geometric progression
袖章
发表于 2025-3-29 00:20:55
Ordinary Differential Equationsa function .(.) of ., and its derivatives ., ., etc. with each other. The fundamental task is to find a function .(.) that satisfies this equation. It may be that not one, but many functions form different solutions.