IIT Madras Course , Prof. T.E. Venkata Balaji

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IIT Madras Course , Prof. T.E. Venkata Balaji

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An Introduction to Riemann Surfaces and Algebraic Curves Complex 1-Tori and Elliptic Curves by Dr. T.E. Venkata Balaji, Department of Mathematics, IIT Madras. For more details on NPTEL visit httpwww.nptel.iitm.ac.insyllabus111106044Goals To analyze Moebius transformations with more than one fixed point in the extended complex plane To continue with the classification of Moebius transformations begun in the previous lecture by defining the notions of loxodromic, elliptic and hyperbolic Moebius transformations using the values of the square of the trace of the transformation To characterize geometrically the loxodromic, elliptic and hyperbolic Moebius transformations by showing that they can be conjugated by suitable Moebius transformations to multiplication by a complex number To show that the elliptic Moebius transformations are precisely those that are conjugate to a rotation about the origin To show that the hyperbolic Moebius transformations are precisely those that are conjugate to a real scalingKeywords Parabolic, elliptic, hyperbolic and loxodromic Moebius transformations, fixed point of a Moebius transformation, square of the trace of a Moebius transformation, translation, conjugation by a Moebius transformation, special linear group, projective special linear group

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- 1.The Idea of a Riemann Surface
- 2.Simple Examples of Riemann Surfaces
- 3.Maximal Atlases and Holomorphic Maps of Riemann Surfaces
- 4.A Riemann Surface Structure on a Cylinder
- 5.A Riemann Surface Structure on a Torus I
- 6.Riemann Surface Structures on Cylinders and Tori via Covering Spaces II
- 7.Moebius Transformations Make up Fundamental Groups of Riemann Surfaces
- 8.Homotopy and the First Fundamental Group
- 9.A First Classification of Riemann Surfaces
- 10.The Importance of the Path-lifting Property
- 11.Fundamental groups as Fibres of the Universal covering Space
- 12.The Monodromy Action
- 13.The Universal covering as a Hausdorff Topological Space
- 14.The Construction of the Universal Covering Map
- 15.Completion of the Construction of the Universal Coveringl
- 16.Completion of the Construction of the Universal Covering The Fundamental Group I
- 17.The Riemann Surface Structure on the Topological Covering of a Riemann Surface
- 18.Riemann Surfaces with Universal Covering the Plane or the Sphere I
- 19.Classifying Complex Cylinders Riemann Surfaces
- 20.Characterizing Moebius Transformations with a Single Fixed Point
- 21.Characterizing Moebius Transformations with Two Fixed Points I
- 22.Torsion-freeness of the Fundamental Group of a Riemann Surface
- 23.Characterizing Riemann Surface Structures on Quotients of the Upper Half
- 24.Classifying Annuli up to Holomorphic Isomorphism
- 25.Orbits of the Integral Unimodular Group in the Upper Half-Plane
- 26.Galois Coverings are precisely Quotients by Properly Discontinuous Free Actions
- 27.Local Actions at the Region of Discontinuity of a Kleinian Subgroup
- 28.Quotients by Kleinian Subgroups give rise to Riemann Surfaces
- 29.The Unimodular Group is Kleinian
- 30.The Necessity of Elliptic Functions for the Classification of Complex Tori
- 31.The Uniqueness Property of the Weierstrass Phe-function
- 32.The First Order Degree Two Cubic Ordinary Differential Equation satisfied
- 33.The Values of the Weierstrass Phe function at the Zeros of its Derivative
- 34.The Construction of a Modular Form of Weight Two on the Upper Half-Plane
- 35.The Fundamental Functional Equations satisfied by the Modular Form of Weight
- 36.The Weight Two Modular Form assumes Real Values on the Imaginary Axis
- 37.The Weight Two Modular Form Vanishes at Infinity I
- 38.The Weight Two Modular Form Decays Exponentially in a Neighbourhood of Infinity III
- 39.A Suitable Restriction of the Weight Two Modular Form is a Holomorphic Conformal
- 40.The J-Invariant of a Complex Torus (or) of an Algebraic Elliptic Curve
- 41.A Fundamental Region in the Upper Half-Plane for the Elliptic Modular J-Invariant
- 42.The Fundamental Region in the Upper Half-Plane for the Unimodular Group I
- 43.A Region in the Upper Half-Plane Meeting Each Unimodular Orbit Exactly Once
- 44.Moduli of Elliptic Curves
- 45.Punctured Complex Tori are Elliptic Algebraic Affine Plane
- 46.The Natural Riemann Surface Structure on an Algebraic Affine Nonsingular Plane Curve
- 47.Complex Projective 2-Space as a Compact Complex Manifold of Dimension Two
- 48.Complex Tori are the same as Elliptic Algebraic Projective Curves I

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