147 citations · 733 across the 37 of their papers we have counts for
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math.DG2012★ 5 cited
Geometrically formal 4-manifolds with nonnegative sectional curvature
Christian Baer
A Riemannian manifold is called geometrically formal if the wedge product of any two harmonic forms is again harmonic. We classify geometrically formal compact 4-manifolds with non…
math.AP2012★ 3 cited
Some properties of solutions to weakly hypoelliptic equations
Christian Baer
A linear different operator L is called weakly hypoelliptic if any local solution u of Lu=0 is smooth. We allow for systems, that is, the coefficients may be matrices, not necessar…
math.DG2012★ 1 cited
Renormalized Integrals and a Path Integral Formula for the Heat Kernel on a Manifold
Christian Baer
We introduce renormalized integrals which generalize conventional measure theoretic integrals. One approximates the integration domain by measure spaces and defines the integral as…