小故事
发表于 2025-3-26 21:34:08
0172-5939practical problems demand of the mathematician not only greater readi ness for extra-mathematical applications but also more comprehensive orientations within mathematics. In applications, it is frequently less important to draw the most far-reaching conclusions from a single mathe matical idea t
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发表于 2025-3-27 04:37:15
The Fredholm Alternativef the adjoint homogeneous equation F*u = 0; the inhomogeneous equation Fu = v is solvable exactly when.This statement is called the “Fredholm alternative”; its equivalence with “index F = 0” follows from Theorem 3.1.
别名
发表于 2025-3-27 07:23:44
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CAB
发表于 2025-3-27 13:25:55
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亚当心理阴影
发表于 2025-3-27 16:57:59
Fredholm Operatorshigher level. The first level of mathematical abstraction leads us to the concept of the individual numbers, as indicated for example by the Arabic numerals, without as yet any undetermined symbol representing some unspecified number. This is the stage of elementary arithmetic; in algebra we use und
Expertise
发表于 2025-3-27 19:33:05
Algebraic Properties. Operators of Finite Rankr, the index no longer depends on the explicit form of the map, but only on the dimensions of the vector spaces between which it operates. More precisely, show that every linear map T: H → H’ where H and H’ are finite-dimensional vector spaces has index given by index T = dim H — dim H’.