Minkowski, Hecke, Landau, Sylvester, and Other Classical Mathematics Authors: Modern LaTeX Drafts

General author cluster for the Modern LaTeX Editions of Mathematics Manuscripts project. This record holds working packets for authors that are not yet split into dedicated author records, including Minkowski, Hecke, Landau, Frobenius, Poincare, Kneser, Kronecker, Picard, Klein-Fricke, and related classical mathematics. Some former mixed-shelf authors now have dedicated records; older copies here remain backstop/provenance where present. Status at a glance. This is a staging shelf. Some packages are source-witnessed working drafts; others are update packets, provenance, OCR/source-witness aids, or repair materials. Readers should use package README/status files and the public GitHub mirror for current status and correction pathways. Latest update. Adds Kneser_LVR_p0193_0206_DE_EN_20260612.zip, covering Kneser Lehrbuch der Variationsrechnung source pages p0193-p0206 upper. The tranche begins with the Fifth Section, section 43, ends after the section 45 example on p0206, and intentionally leaves the lower p0206 section 46 opening for the next tranche. Figures 21-23 use source-derived crops only, not redrawn replacements. The package includes German/English slice and cumulative TeX/PDF, high-quality current/cumulative scan witnesses, figure/math/source ledgers, render checks, and removal/slop audit files. Corrections and collaboration. Source comparisons, LaTeX fixes, translation corrections, and reader-facing issue reports can be suggested through GitHub issues or pull requests: https://github.com/KokunoYumeto/modern-latex-manuscripts.