Expressly 发表于 2025-3-25 06:55:12
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0172-6056 nt books do use linear algebra, it is only the algebra of ~3. The student‘s preliminary understanding of higher dimensions is not cultivated.978-1-4612-6155-1978-1-4612-6153-7Series ISSN 0172-6056 Series E-ISSN 2197-5604不朽中国 发表于 2025-3-25 14:05:12
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How People View Computing Today,on .:. → ℝ.. associated with the vector field . by .(.) = (., .(.)), . ∈ ., actually maps . into the unit .-sphere S. ⊂ ℝ.. since ∥.(.)∥ = 1 for all . ∈ .. Thus, associated to each oriented .-surface . is a smooth map .: . → S.. called the .. . may be thought of as the map which assigns to each poininnovation 发表于 2025-3-26 01:47:28
https://doi.org/10.1007/978-1-84628-551-6 proccss of differentiation of vector fields and functions defined along parametrized curves. In order to allow the possibility that such vector fields and functions may take on different values at a point where a parametrized curve crosses itself, it is convenient to regard these fields and functioSEVER 发表于 2025-3-26 06:54:43
https://doi.org/10.1057/9781137313676however, generally not tangent to .. We can, nevertheless, obtain a vector field tangent to . by projecting Ẋ(.) orthogonally onto .. for each . ∈ . (see Figure 8.1). This process of differentiating and then projecting onto the tangent space to . defines an operation with the same properties as diffNEG 发表于 2025-3-26 10:32:10
,Treatment 1—Therapeutic Materials,r transformation on the 1-dimensional spacc .. Sincc every linear transformation from a 1-dimensional space to itself is multiplication by a real number, there exists, for each . ∈ ., a real number .(p) such that .. K(.) is called the . of . at ..中子 发表于 2025-3-26 16:14:37
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https://doi.org/10.1007/978-1-4615-8744-6ee Figure 13.1). An oriented .-surface . is . at . ∈ . if there exists an open set . ⊂ ℝ.. containing . such that . ∩ . is contained either in . or in .. Thus a convex .-surface is necessarily convex at each of its points, but an .-surface convex at each point need not be a convex .-surface (see Fig