Bicomplex Holomorphic Functions: The Algebra, Geometry and by M. Elena Luna-Elizarrarás, Visit Amazon's Michael Shapiro

By M. Elena Luna-Elizarrarás, Visit Amazon's Michael Shapiro Page, search results, Learn about Author Central, Michael Shapiro, , Daniele C. Struppa, Adrian Vajiac

The goal of this e-book is to strengthen the principles of the idea of holomorphicity at the ring of bicomplex numbers. hence, the main target is on expressing the similarities with, and transformations from, the classical idea of 1 complicated variable. the result's an straightforward but complete advent to the algebra, geometry and research of bicomplex numbers.

Around the center of the 19th century, numerous mathematicians (the most sensible recognized being Sir William Hamilton and Arthur Cayley) took an interest in learning quantity platforms that prolonged the sphere of advanced numbers. Hamilton famously brought the quaternions, a skew box in real-dimension 4, whereas virtually at the same time James Cockle brought a commutative 4-dimensional genuine algebra, which was once rediscovered in 1892 by way of Corrado Segre, who talked about his parts as bicomplex numbers. some great benefits of commutativity have been observed through the advent of 0 divisors, anything that for some time dampened curiosity during this topic. lately, due principally to the paintings of G.B. rate, there was a resurgence of curiosity within the learn of those numbers and, extra importantly, within the research of features outlined at the ring of bicomplex numbers, which mimic the habit of holomorphic services of a posh variable.

While the algebra of bicomplex numbers is a 4-dimensional genuine algebra, it really is helpful to think about it as a “complexification” of the sphere of complex

numbers; from this angle, the bicomplex algebra possesses the homes of a one-dimensional thought within 4 actual dimensions. Its wealthy research and cutting edge geometry supply new rules and strength purposes in relativity and quantum mechanics alike.

The booklet will entice researchers within the fields of advanced, hypercomplex and practical research, in addition to undergraduate and graduate scholars with an curiosity in a single- or multidimensional complicated analysis.

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Additional resources for Bicomplex Holomorphic Functions: The Algebra, Geometry and Analysis of Bicomplex Numbers

Example text

Thus, the geometry behind them is much more sophisticated. In the next chapter we will elaborate on this. , a module over itself, which suggests the introduction of a bicomplex bilinear form BBC (Z, W ) := Z · W and of three bicomplex sesquilinear-type forms: BBC,bar (Z, W ) := Z · W , (a bar-sesquilinear form) , † (a †-sesquilinear form) , ∗ (a ∗-sesquilinear form) . BBC,† (Z, W ) := Z · W , BBC,∗ (Z, W ) := Z · W , The corresponding quadratic forms coincide with the three “moduli” previously introduced, which take complex or hyperbolic values, making the geometric aspect even more complicated than the above described case of the D-module BC = D2 .

6. 2: The hyperbolic segment [k, 1]D . If A ⊂ D is a set D-bounded from above, we define the notion of its Dsupremum, denoted by supD A, to be the least upper bound for A, and its Dinfimum inf D A to be the greatest lower bound for A. The “least” upper bound here means that supD A α for any D-upper bound α even if not all of the D-upper bounds are comparable. Similarly the meaning of the “greatest” lower bound is understood. Of course, every non-empty set of hyperbolic numbers which is Dbounded from above has its D-supremum, and if it is D-bounded from below, then it has its D-infimum.

The Bicomplex Numbers b) if Z = x1 + k y2 ∈ D, where x1 ∈ R and y2 ∈ R, then in general |Z · U | = |Z| · |U | . More precisely, |Z · U |2 = |Z|2 · |U |2 + 4 x1 y2 Re(i u1 u2 ). Proof. We prove first a). Indeed, take Z = z1 ∈ C(i) and U = u1 + ju2 = (u1 − i u2 ) e + (u1 + i u2 ) e† , then |Z · U |2 = | z1 (u1 + ju2 ) |2 = | (z1 u1 ) + j(z1 u2 ) |2 = |z1 u1 |2 + |z1 u2 |2 = |z1 |2 · |U |2 = |Z|2 · |U |2 , where we used the fact that the Euclidean norm of a complex number (both in C(i) and in C( j)), seen as a bicomplex number, coincides with its modulus.

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