Herr Dr. Sören Sprehe: Teaching
All courses for recent semesters:
WiSe 2025/2026
| Reference no. | Teaching staff | Topic | Type | Dates | My eKVV |
|---|---|---|---|---|---|
| 240092 | Alfes, Sprehe |
Seminar/Bachelorarbeit Algebra
Limited number of participants: 15 |
S | Tue 12-14 [13.10.2025-06.02.2026] |
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| 240153 | Alfes, Sprehe | Algebraic Number Theory Course taught in English | V |
Tue 10-12 [13.10.2025-06.02.2026]
Fri 10-12 [13.10.2025-06.02.2026] |
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SoSe 2024
| Reference no. | Teaching staff | Topic | Type | Dates | My eKVV |
|---|---|---|---|---|---|
| 240032 | Sprehe |
Proseminar Quadratische Formen
Limited number of participants: 15 |
PS | Fri 10-12 in V4-116 [08.04.-19.07.2024] |
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| 241038 | Sprehe | Ausgewählte Kapitel der arithmetischen Geometrie | S |
Thu 12-14 in V5-148 [08.04.-19.07.2024]
Thu 14-16 in T2-205 [18.04.2024] Thu 14-16 in H8 [02.05.2024] Thu 14-16 in T2-205 [23.05.2024] Thu 14-16 in X-E1-107 [13.06.2024] Thu 14-16 in H8 [27.06.2024] ... |
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WiSe 2022/2023
| Reference no. | Teaching staff | Topic | Type | Dates | My eKVV |
|---|---|---|---|---|---|
| 241256 | Sprehe |
Rigid meromorphic cocycles III
Recently H.Darmon and J.Vonk initiated the theory of p-adic singular moduli for real quadratic fields. In this theory classical modular functions such as the j-invariant are replaced by so-called rigid meromorphic cocycles. These are SL2(Z[1/p])-invariant modular symbols with values in rigid meromorphic functions on Drinfeld’s p-adic upper half plane. One of their first results states that the divisor of a rigid meromorphic cocycle is supported on finitely many SL2(Z[1/p])-orbits of real quadratic points, i.e. points which generate real quadratic extensions of Q. This highly suggests that rigid meromorphic cocyles are a real quadratic analogue of Borcherds’ singular theta lifts of modular forms of weight 1/2. This approach does not generalize easily to a more general setup. The aim of this seminar is to follow L.Gehrmann's work "On Quaterionic Rigid Meromorphic", where he proves the algebraicity of divisors in a more general situation by purely cohomological methods. |
S | Thu 14-16 in U2-232 [10.10.2022-03.02.2023] |
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