Welcome! Differential Geometry is an online shop that offers original mathematical jewelry, sculpture, home and office decor, and classroom models; and original mathematical images printed on wall art, clothing, and other items for home and office. The site also hosts a blog that uses visual illustrations and friendly, concrete language to explore mathematical inspirations of images and pieces I design and sell, and a blog of very short posts about free online mathematical materials.
I am mathematician Andrew D. Hwang. In 1993 I earned my PhD in mathematics at the University of California, Berkeley. After a 30-year career in academia, I founded Differential Geometry to design and sell original, distinctive, high-quality images and objects that provide pleasant interactions with mathematics, and to write about mathematics and designs to invite deeper engagement for the curious student in each of us. My primary inspiration is form, accessible to everyone without technical training, as an open invitation into abstract realms often seen only at the university level.
I sell quality products and provide responsive customer service. My mission includes employing socially and environmentally responsible manufacturing; providing accurate, concrete explanations to accompany products; and maintaining accessible pricing. Your satisfaction is among my highest priorities.
Welcome again, and thank you for visiting! I look forward to seeing your around, and collaboratively building love of math.