Blackboard Shots with Prefix "Martchenkov"

240411-110151: Comparing upper and lower Wirtinger.

240319-132314: Comparing Wirtinger and Dehn.

240312-131731: Back to equivalence of presentations.

240226-151054: The extra row.

240124-115045: The fundamental forms of planar curves (2).

240117-154443: The fundamental forms of planar curves.

231109-152459: More on $H_1(\tilde{X})$ (2).

231102-145504: More on $H_1(\tilde{X})$.

231025-144256: $H_1(\tilde{X})$ and $H_1(\tilde{X},\tilde{p})$.

231011-161249: The relation between the upper and the lower Wirtinger presentations.

231005-145332: The Abelianization of Dehn.

230919-171324: Invariance of Alexander formulas.

230601-123143: The Dehn presentation and the Alexander polynomial (2).

230425-142328: The Dehn presentation and the Alexander polynomial.

230223-125050: Matrices and quadratics.