Ahmad Issa

I have recently moved to the University of British-Columbia. My advisor at UT was Cameron Gordon. I'm interested in 3- and 4-dimensional topology, especially using smooth obstructions such as Donaldson's theorem and those from Heegaard Floer homology to answer questions about knots and 3-manifolds. I am also interested in triangulations of 3- and 4-manifolds.

Before coming to Austin, I studied at the University of Melbourne in Australia where I completed a Master of Science under the supervision of Craig Hodgson.


Smoothly embedding Seifert fibered spaces in S^4, joint with Duncan McCoy.
( arXiv )

The realization problem for non-integer Seifert fibered surgeries, joint with Duncan McCoy.
( arXiv )

On Seifert fibered spaces bounding definite manifolds, joint with Duncan McCoy.
( arXiv )

Triangulating Cappell-Shaneson homotopy 4-spheres -- MPhil Thesis (2017)
( pdf )

The classification of quasi-alternating Montesinos links, Proc. Amer. Math. Soc. 146 (2018), 4047-4057.
( arXiv | journal )

Non-geometric veering triangulations, joint with Craig Hodgson and Henry Segerman, Exp. Math. 25 (2016), no. 1, 17-45.
( arXiv | journal )

Non-geometric veering triangulations -- MSc thesis.
( pdf )


Non-geometric veering triangulations. (beamer slides)
Oklahoma State University - Topology Seminar, March 14th 2014.

Embedding 3-manifolds in the 4-sphere. (beamer slides)
University of Texas at Austin - Candidacy talk, May 2nd 2016.

Computer programs

Veering is a computer program which can be used to construct veering triangulations of mapping tori as introduced by Ian Agol.