Joji Kajiwara

R.P. Gilbert

Heinrich G.W. Begehr

Let 8 be a Riemann surface of analytically finite type (9, n) with 29 2+n> O. Take two pointsP1, P2 E 8, and set 8,1>2= 8 \ {P1' P2}. Let PI Homeo+(8;P1,P2) be the group of all orientation preserving homeomor phismsw: 8 -+ 8 fixingP1, P2 and isotopic to the identity on 8. Denote byHomeot(8;Pb P2) the set of all elements ofHomeo+(8;P1, P2) iso topic to the identity on 8,P2' ThenHomeot(8;P1,P2) is a normal sub pl group ofHomeo+(8;P1,P2). We setIsot(8;P1,P2) =Homeo+(8;P1,P2)/ Homeot(8;p1, P2). The purpose of this note is to announce a result on the Nielsen Thurston-Bers type classification of an element [w] ofIsot+(8;P1,P2). We give a necessary and sufficient condition for thetypeto be hyperbolic. The condition is described in terms of properties of the pure braid [b] w induced by [w]. Proofs will appear elsewhere. The problem considered in this note and the form ofthe solution are suggested by Kra's beautiful theorem in [6], where he treats self-maps of Riemann surfaces with one specified point. 2 TheclassificationduetoBers Let us recall the classification of elements of the mapping class group due to Bers (see Bers [1]). LetT(R) be the Teichmiiller space of a Riemann surfaceR, andMod(R) be the Teichmtiller modular group of R. Note that an orientation preserving homeomorphism w: R -+ R induces canonically an element (w) EMod(R). Denote by & .r(R)(·, .) the Teichmiiller distance onT(R). For an elementXEMod(R), we define a(x)= inf & .r(R)(r, x(r)).

Volume 2: This project has been executed with Grant No. 11–56 from the Commemorative Association for the Japan World Exposition (1970)

Proceedings of the Second ISAAC Congress

Yongzhi S. Xu

The book consists of state-of-the-art chapters on Nevanlinna theory, Fatou-Julia theory, entire and meromorphic functions, several complex variables, computer applications to complex analysis, line bundles, and collocation methods. Audience: Researchers working in the field as well as scientists interested in the applications.

Recent Developments in Complex Analysis and Computer Algebra

Zhong Li

Kwang Ho Shon

This volume presents the proceedings of the Seventh International Colloquium on Finite or Infinite Dimensional Complex Analysis held in Fukuoka, Japan. The contributions offer multiple perspectives and numerous research examples on complex variables, Clifford algebra variables, hyperfunctions and numerical analysis.

Joji Kajiwara

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