Degree Bounds for Amoeba Contours

Abstract

We investigate the real algebraic complexity of contours of amoebas associated with algebraic hypersurfaces and complete intersections in complex algebraic tori. Motivated by the foundational estimates of Lang--Shapiro--Shustin \cite{LSS}, we develop a toric and logarithmic approach relating contour geometry to logarithmic Gauss maps, mixed volumes, and Newton polytope geometry. We prove that the logarithmic criticality equations admit substantially sharper asymptotic behavior than the classical Pfaffian bounds, reducing the expected growth from order $d^{2n}$ to order $d^n$. We further formulate a conjectural asymptotic theory for complete intersections based on logarithmic Grassmannian geometry and Schubert degeneracy loci. The work establishes new connections between amoeba theory, real algebraic geometry, tropical geometry, and logarithmic toric geometry.