# On the Frobenius direct image of the structure sheaf of a homogeneous   projective variety

**Authors:** Masaharu Kaneda

arXiv: 1704.01780 · 2018-09-13

## TL;DR

This paper provides an example of a homogeneous projective variety where the Frobenius direct image of its structure sheaf exhibits nonvanishing self-extensions, highlighting a unique property in algebraic geometry.

## Contribution

It introduces a specific example demonstrating nonvanishing self-extensions of the Frobenius direct image, a novel phenomenon in the study of homogeneous projective varieties.

## Key findings

- Frobenius direct image can have nonvanishing self-extensions.
- Example of a homogeneous projective variety with this property.
- Insights into the structure of sheaves under Frobenius morphism.

## Abstract

We present an example of a homogeneous projective variety the Frobenius direct image of the structure sheaf of which has nonvanishing self extension.

## Full text

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## References

28 references — full list in the complete paper: https://tomesphere.com/paper/1704.01780/full.md

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Source: https://tomesphere.com/paper/1704.01780