Module Handbook

  • Dynamischer Default-Fachbereich geändert auf MAT

Course MAT-40-30-K-4

Plane Algebraic Curves; Quadratic Number Fields (4V+2U, 9.0 LP)

Course Type

SWS Type Course Form CP (Effort) Presence-Time / Self-Study
- K Lecture with exercise classes (V/U)
4 V Lecture 6.0 CP 56 h 124 h
2 U Exercise class (in small groups) 3.0 CP 28 h 62 h
(4V+2U) 9.0 CP 84 h 186 h


CP, Effort 9.0 CP = 270 h
Position of the semester 1 Sem. irreg. SuSe
Level [4] Bachelor (Specialization)
Language [EN] English
+ further Lecturers of the department Mathematics
Area of study [MAT-AGCA] Algebra, Geometry and Computer Algebra
Additional informations
Livecycle-State [NORM] Active


The course consists of the two parts [MAT-40-28-K-4] and [MAT-40-29-K-4].

In each summer semester at least one of the courses [MAT-40-30-K-4], [MAT-40-31-K-4] or [MAT-40-32-K-4] is offered.

Possible Study achievement

  • Verification of study performance: proof of successful participation in the exercise classes (ungraded)
  • Details of the examination (type, duration, criteria) will be announced at the beginning of the course.
    The certificate for the exercises ("Übungsschein") consists of the two (partial) certificates for the exercises in the courses [MAT-40-28-K-4] and [MAT-40-29-K-4].


Plane Algebraic Curves:

Compulsory Topics:

  • Affine and projective spaces, in particular, the projective line and the projective plane,
  • Plane algebraic curves over the complex numbers,
  • Smooth and singular points,
  • Bézout's Theorem for projective plane curves,
  • Topological genus of a curve and the genus formula,
  • Rational maps between plane curves and the Riemann-Hurwitz formula.

In addition, a selection of the following topics is covered:

  • Polar and Hessian curves,
  • Dual curves and Plücker’s formulas,
  • Linear systems and divisors on smooth curves,
  • Real projective curves,
  • Puiseux-parameterizations of plane curve singularities,
  • Invariants of plane curve singularities,
  • Elliptic curves,
  • Further aspects of plane algebraic curves.

Quadratic Number Fields:

  • structure of imaginary quadratic number fields,
  • ideals and ideal class groups,
  • Ideals as geometric lattices,
  • finiteness of the ideal class group.

Competencies / intended learning achievements

In the part "Plane Algebraic Curves", the students have learnt basic concepts of algebraic geometry by studying a class of algebraic varieties which is accessible by selected and simple methods.

In the part "Quadratic Number Fields", the students have studied the extension of a number system through quadratic number fields which is fundamental for number theory. They also have studied the rings contained in quadratic number fields as well as their main properties and some simple applications.


Plane Algebraic Curves:

  • G. Fischer: Ebene algebraische Kurven,
  • E. Brieskorn, H. Knörrer: Plane Algebraic Curves,
  • E. Kunz: Introduction to Plane Algebraic Curves,
  • F. Kirwan: Complex Algebraic Curves,
  • R. Miranda: Algebraic Curves and Riemann Surfaces.

Quadratic Number Fields:

  • I.N. Stewart, D.O. Tall: Algebraic Number Theory,
  • M. Trifković: Algebraic Theory of Quadratic Numbers.


Further literature will be announced in the lecture; Exercise material is provided.


Registration for the exercise classes via the online administration system URM (

Requirements for attendance (informal)

More advanced knowledge from the courses [MAT-12-22-K-3], [MAT-12-21-K-3] and [MAT-12-26-K-3] is useful but not necessarily required.



Requirements for attendance (formal)


References to Course [MAT-40-30-K-4]

Course-Pool Name
[MAT-40-4V-KPOOL-4] Elective Courses Algebra, Geometry and Computeralgebra (4V, B.Sc.)
[MAT-40-KPOOL-4] Specialisation Algebra, Geometry and Computer Algebra (B.Sc.)