2 citations · 2 across the 9 of their papers we have counts for
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A chain complex and Quadrilaterals for normal surfaces
Siddhartha Gadgil, Tejas Kalelkar
We interpret a normal surface in a (singular) three-manifold in terms of the homology of a chain complex. This allows us to study the relation between normal surfaces and their qua…
Watson-Crick pairing, the Heisenberg group and Milnor invariants
Siddhartha Gadgil
We study the secondary structure of RNA determined by Watson-Crick pairing without pseudo-knots using Milnor invariants of links. We focus on the first non-trivial invariant, which…
Algebraic and Geometric intersection numbers for free groups
Siddhartha Gadgil, Suhas Pandit
We show that the algebraic intersection number of Scott and Swarup for splittings of free groups coincides with the geometric intersection number for the sphere complex of the conn…
Incompressibility and Least-Area surfaces
Siddhartha Gadgil
We show that if is a smooth, closed, orientable surface embedded in a closed, orientable 3-manifold such that for each Riemannian metric on , is isotopic to a le…
Degree-one maps, surgery and four-manifolds
Siddhartha Gadgil
We give a description of degree-one maps between closed, oriented 3-manifolds in terms of surgery. Namely, we show that there is a degree-one map from a closed, oriented 3-manifold…