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Answers

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Reference request: Riemannian manifold of linear isometries from $\mathbb{C}^n$ into $\mathbb{C}^m$

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Algebraic topology in low regularity

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Good book on Calculus of Variations

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Ellipsoids and lattices: an enclosure problem.

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Intuition for Levi-Civita connection via Hamiltonian flows

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Fubini-Study metric for an infinite dimensional Hilbert space

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Characterizing Hessians among symmetric bilinear tensors

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determining a convex set by mixed volumes

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Submersions from compact flat manifold

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Research trends in geometry of numbers?

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Reversibility vs geodesic reversibility for Finsler metrics on the two-sphere

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Known size invariant for Riemannian manifolds?

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Conley index for isolated invariant sets with no exit points

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New grand projects in contemporary math

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Old books still used

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Liouville’s theorem with your bare hands

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Analytic Lagrangian Submanifolds

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Jacobi method on first order partial differential equations

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Which differential equations allow for a variational formulation?

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A good reference to grok hypergeometric functions?

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Which immersed plane curves bound an immersed disc?

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Criteria for Positivity of Pseudoddifferential Operators on Manifolds

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The “ds” which appears in an integral with respect to arclength is not a 1-form. What is it?

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“Modern” proof for the Baker-Campbell-Hausdorff formula

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Quermassintegrals as mean curvature integrals

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How often do people read the work that they cite?

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Approachable French Masters

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Topics for a matrix analysis course

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Reference wanted for application of Parametric Transversality

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is the geodesic flow on Hyperbolic Plane completely integrable?