Read e-book online Basics of Functional Analysis with Bicomplex Scalars, and PDF

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By Daniel Alpay

ISBN-10: 3319051091

ISBN-13: 9783319051093

ISBN-10: 3319051105

ISBN-13: 9783319051109

This booklet presents the principles for a rigorous concept of sensible research with bicomplex scalars. It starts with an in depth learn of bicomplex and hyperbolic numbers after which defines the thought of bicomplex modules. After introducing a few norms and internal items on such modules (some of which look during this quantity for the 1st time), the authors boost the speculation of linear functionals and linear operators on bicomplex modules. All of this can serve for lots of diversified advancements, like the ordinary sensible research with advanced scalars and during this publication it serves because the foundational fabric for the development and examine of a bicomplex model of the well-known Schur analysis.

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Additional resources for Basics of Functional Analysis with Bicomplex Scalars, and Bicomplex Schur Analysis

Sample text

First note that, if one of a0 or b0 is zero, let us say γ0 = a0 · e, then Sγ0 = {Z = β1 · e | |β1 | = a0 }, and this set is a circumference in the real two–dimensional plane BCe with center a0 at the origin and radius √ = |a0 · e|. Similarly, if γ0 = b0 · e† , the set Sγ0 is a 2 b0 circumference in BCe† with center at the origin and radius √ = |b0 · e† |. 2 16 Fig. 5 A Partial Order on D and a Hyperbolic-Valued Norm 17 If a0 = 0 and b0 = 0 then the intersection of the hyperbolic plane D and the sphere Sγ0 consists of exactly four hyperbolic numbers: ±a0 e ± b0 e† , where the plane D touches the sphere tangentially.

The next step is to prove what the analog of being “Hermitian for an inner product” is in our situation. y, x⊗→X = ey1 + e† y2 , ex1 + e† x2 ⊗→X = e y1 , x1 ⊗1 + e† y2 , x2 ⊗2 → = e y1 , x1 ⊗1 + e† y2 , x2 ⊗2 = e x1 , y1 ⊗1 + e† x2 , y2 ⊗2 = x, y⊗ X . Note that the “inner product square” 4 Norms and Inner Products on BC-Modules 44 x, x⊗ X = e∈x1 ∈21 + e† ∈x2 ∈22 ∗ D+ . 7) is always a positive hyperbolic number, without a need for any additional requirements on ·, ·⊗1 and ·, ·⊗2 . 7) always verifies.

But we are not aware of any work that treats the convergence with respect to a norm with hyperbolic values. 4 A sequence of bicomplex numbers {Z n }n∈N converges to the bicomplex number Z 0 with respect to the hyperbolic-valued norm | · |k if for all ε > 0 there exists N ∈ N such that for all n ≥ N there holds: |Z n − Z 0 |k ε. 12), it follows that a sequence {Z n }n∈N converges to the bicomplex number Z 0 with respect to the hyperbolic-valued norm if and only if it converges to Z 0 with respect to the Euclidean norm, and so even though the two norms cannot be compared as they take values in different rings, one still obtains the same notion of convergence.

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Basics of Functional Analysis with Bicomplex Scalars, and Bicomplex Schur Analysis by Daniel Alpay


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