# Null Math Mark > The secondary Null Angel mark — the null/empty-set symbol rendered as gearwork, in the teal gradient. Published: 2025-01-01 Tags: Logo, Brand, Svg, Secondary Canonical: https://null-angel.com/media/logos/null-math-mark/ --- About This Mark # The null math mark is the project’s symbolic form — the empty set from mathematics and code, drawn as machinery. It works where the full wordmark is too wide or too detailed: avatars, favicons, stamps on artwork, anywhere the shape has to read at small sizes. It carries the same teal gradient as the primary logo. Usage # Format Use SVG Web, print — scales infinitely PNG / WebP Raster fallbacks, available in the site assets Provided for editorial and non-commercial promotional use with attribution. Commercial use or modification requires written permission.