... Only *innocence* can surmount them, which mere knowledge doesn't even take into account, in those moments when we find ourselves able to listen to things, totally and intensely absorbed in child's play. — Alexander Grothendieck « Récoltes et Semailles »

Preprints

*Maximally Frobenius-destabilized vector bundles over smooth algebraic curves * (2014). arXiv:1408.5117.

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Essentially, when a vector bundle becomes very, very unstable after Frobenius pullback, we can learn a lot about the stability of the bundle itself (depending on whether its rank is larger than, equal to, or lower than the characteristic p).
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*Limiting behavior of Donaldson's heat flow on non-Kähler surfaces * (2013-2014, with Jacob McNamara). arXiv:1403.8037.

*Lifting representations of finite reductive groups: a character relation* (2011-2012, with Jeffrey Adler *et al*). arXiv:1205.6448.

Seminar: ind-coherent sheaves

Justin Campbell, Hunter Spink, and I are organizing a seminar on derived algebraic geometry, with an emphasis on the theory of ind-coherent sheaves. Here is the seminar page.

Old learning notes

(Warning: I make mistakes! If you find them, email me.)

*The Bondal-Orlov reconstruction theorem. * pdf.

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These are notes for my talk at AGLS.
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*Deligne's theorems on degeneration of spectral sequences. * pdf.

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Leray spectral sequence and Hodge-de Rham spectral sequence.
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*Finite and abelian affine group schemes. * pdf.

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Cartier duality, étale group schemes, group schemes of multiplicative type.
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*Tensor product of semistable vector bundles over curves in characteristic zero. * pdf.

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Namely, the tensor product is still semistable. Almost all technical ingredients are explained in detail.
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Other things that you may find interesting

The Stacks Project. Link.

Some of my old piano compositions:

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Sonata (2009). Recording (7'50''). Manuscript.
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Notes in b-minor (2009). Recording (1'25'').
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