Welcome to Differential Geometry, and thank you for visiting! Differential Geometry is an online shop that sells original mathematical jewelry and sculpture, original mathematical images printed on wall art, clothing, and other items. The site also hosts a math blog whose aim is to promote appreciation of mathematics and mathematical beauty.
I am freelance 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 mathematical images and objects that provide pleasant interactions with math and invite deeper engagement for the curious student in each of us.
I develop products and write posts to welcome viewers and readers into mathematics: to arouse curiosity and wonder, to convey the beauty of geometry, analysis, and algebra. My primary inspiration is form, accessible to everyone without technical training, as an invitation into abstract realms often seen only at the university level.
My mission includes employing socially and environmentally responsible manufacturing; providing accurate, concrete explanations to accompany products; and maintaining accessible pricing.
I sell quality products and provide responsive customer service. Your satisfaction with your purchases is among my highest priorities. If any part of an order is not what you expected, or if a problem beyond normal wear and tear arises at any time with a product you purchased at Differential Geometry, kindly email contact -at- differential-geometry -dot- com to let me know. I stand behind what I design and sell, and am happy to work with you.
There are separate pages detailing shipping, and our policies for privacy and returns.
Welcome again! I look forward to your questions, comments, and insights.