Geometric Group Thoery, Low-dimensional Topology, Contact and Simplectic Geometry
Recommended Texts or Study Materials
General Topology:
- Algebraic Topology - Hatcher PDF
- Differential Geometry (Manifolds, Vector fields, Differential forms)
- Kirby Calculus (Handle decompositions, Heegaard diagrams) Recommended Refernece: 4-Manifolds and Kirby Calculus by Gompf and Stipsicz
Contact Geometry:
Geometric Group Theory:
- Groups, Graphs, and Trees, Meier.
- A Course on Geometric Group Theory, Bowditch. (This is available online, they are lecture notes)
- Topological Methods in Group Theory, Scott and Wall.
- Geometric Group Theory, Papazoglou.
Foundational Tools/Techniques/Ideas:
General Topology:
- Computing the fundamental group, homology, and cohomology of various spaces. Covering spaces, deck transformations, cyclic covers, etc. Meyer-Vietoris.
- Understand and be able to apply Universal Coefficient theorem, Kunneth Formula and Duality theorems
Geometric Group Theory:
- Cayley graphs, quasi-isometry invariants (e.g. Gromov Hyperbolic, Dehn functions, boundary, etc.), CAT(k) spaces, Milnor Svarc Lemma.
Common Advisors and Committee Members
Geometric Group Theory:
Advisor 1 |
Committee Member 1 |
Committee Member 2 |
Dr. Pallavi Dani |
Dr. Shea Vela-Vick |
Dr. Dan Cohen |
General Topology and Contact Geometry:
Advisor 1 |
Committee Member 1 |
Committee Member 2 |
Dr. Oliver Dasbach |
Dr. Shea Vela-Vick |
Dr. Pallavi Dani |
Dr. Shea Vela-Vick |
Dr. Scott Baldridge |
Dr. Pallavi Dani |
Previously asked questions
General Topology:
- Prove that \(\mathbb{R}^m\cong \mathbb{R}^n \) iff \(m=n\). Next, compute the homology of \(S^n\).
- Compute the homology of \(S^2\wedge S^1\).
- Pick a graph of your choice (or for some CW complex), draw the 2-fold covering space, draw the universal covering space, What are the deck transformations?
- Show why \( \mathbb{C}P^{2} \) is not the same as its orientation reverse using cohomology.
- Show that for any connected closed orientable \(n\) manifold \(M\) there is a degree 1 map \(M \rightarrow S^n\)
- \( \mathbb{R}P^3 \) is not homotopy equivalent to \( \mathbb{R}P^2 \vee S^3 \)
- Show that a compact manifold does not retract onto its boundary
- Show that for a degree 1 map \( f : M \ rightarrow N \) of connected closed orientable manifolds, the induced map on fundamental group is surjective, hence also the one induced in homology
- Are there degree 1 maps from closed oriented genus \(g\) surface \(\Sigma_g \to \Sigma_h\) for arbitrary \(g\) and \(h\)? restrictions on \(g\) and \(h\)?
- What does a regular covering space look like? Specifically, I had a base space of \(S^1\wedge S^1\), which has fundamental group \(F_2=\langle a,b \rangle\) and I constructed the covering spaces corresponding to the subgroups \(\langle a \rangle\) and \(\langle a^2, ab, ab^{-1} \rangle\) and had to explain why the latter covering space "looked" normal while the former covering space did not.
Geometric Group Theory:
- Show that the genus 3 surface is a covering space of the genus 2 surface. (This was motived by showing that all fundamental groups of orientable surfaces with genus \( \geq 2 \) are Gromov hyperbolic).
- Show that BS(1,2) is not a hyperbolic group (i.e. construct its Cayley graph and show its Dehn function has hyperbolic growth.)