compute minimal polynomial of an isogeny & push such polynomials through other isogenies#40467
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vbraun merged 6 commits intosagemath:developfrom Aug 16, 2025
Merged
compute minimal polynomial of an isogeny & push such polynomials through other isogenies#40467vbraun merged 6 commits intosagemath:developfrom
vbraun merged 6 commits intosagemath:developfrom
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GiacomoPope
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LGTM, there's a FIXME, but I can't think of something obvious to replace this.
SageMath version 10.7.rc0, Release Date: 2025-08-02
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sagemathgh-40467: compute minimal polynomial of an isogeny & push such polynomials through other isogenies Back in sagemath#37125 we implemented Algorithms 3 and 4 from [Deuring for the People](https://ia.cr/2023/106). In this patch we add Algorithm 5, as well as a simple convenience method to compute the minimal polynomial of an isogeny. This functionality is very convenient for computing chains of isogenies whose kernel points may live in extension fields — without explicitly constructing and working in those extension fields. URL: sagemath#40467 Reported by: Lorenz Panny Reviewer(s): Giacomo Pope
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Aug 12, 2025
sagemathgh-40467: compute minimal polynomial of an isogeny & push such polynomials through other isogenies Back in sagemath#37125 we implemented Algorithms 3 and 4 from [Deuring for the People](https://ia.cr/2023/106). In this patch we add Algorithm 5, as well as a simple convenience method to compute the minimal polynomial of an isogeny. This functionality is very convenient for computing chains of isogenies whose kernel points may live in extension fields — without explicitly constructing and working in those extension fields. URL: sagemath#40467 Reported by: Lorenz Panny Reviewer(s): Giacomo Pope
vbraun
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sagemathgh-40467: compute minimal polynomial of an isogeny & push such polynomials through other isogenies Back in sagemath#37125 we implemented Algorithms 3 and 4 from [Deuring for the People](https://ia.cr/2023/106). In this patch we add Algorithm 5, as well as a simple convenience method to compute the minimal polynomial of an isogeny. This functionality is very convenient for computing chains of isogenies whose kernel points may live in extension fields — without explicitly constructing and working in those extension fields. URL: sagemath#40467 Reported by: Lorenz Panny Reviewer(s): Giacomo Pope
vbraun
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Aug 14, 2025
sagemathgh-40467: compute minimal polynomial of an isogeny & push such polynomials through other isogenies Back in sagemath#37125 we implemented Algorithms 3 and 4 from [Deuring for the People](https://ia.cr/2023/106). In this patch we add Algorithm 5, as well as a simple convenience method to compute the minimal polynomial of an isogeny. This functionality is very convenient for computing chains of isogenies whose kernel points may live in extension fields — without explicitly constructing and working in those extension fields. URL: sagemath#40467 Reported by: Lorenz Panny Reviewer(s): Giacomo Pope
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Back in #37125 we implemented Algorithms 3 and 4 from Deuring for the People. In this patch we add Algorithm 5, as well as a simple convenience method to compute the minimal polynomial of an isogeny.
This functionality is very convenient for computing chains of isogenies whose kernel points may live in extension fields — without explicitly constructing and working in those extension fields.