Science (2) Surfaces (2) Ciencias (2) Superficies (2) Belvédère (2) Élégance (2) Surfaces (2) Sciences (2) Development (1) Correspondence (1) Correspondence (1) Couples (1) Spherical projection (1) Note-taking (1) New and old (1) Marginalia (1) Intuition (1) Geometry, Projective (1) Geometry, Differential (1) Geometry (1) Example (1) Curvature (1) Belief and doubt (1) Attention (1) Space (1) Sizes (1) Versification (1) Processing (1) Cartas--Redacción (1) Toma de apuntes (1)