Speaker: John Baez Title: 2-Rigs in topology and representation theory Abstract: A rig is a “ring without negatives ... is a symmetric monoidal category that is enriched over commutative monoids, with ...

Gorgeously designed, easy to wear, long-lasting and full of granular health information, the Oura Ring 4 is nearly the perfect fitness tracker. I loved using it, and will continue to do so ...

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Please verify your email address. The Oura Ring 4 is the kind of iterative hardware update I like to see. For the same $349 starting price as the Gen 3 Horizon, Oura's latest smart ring is a bit ...

The Oura Ring 4 offers an impressive AI advisor and a sleek, striking design. But in my experience, it plays far more nicely with iPhone than Android. Oura Ring 4 has entered the chat and is here ...

The Oura Ring 4 is hands-down the greatest smart ring for fitness tracking that money can buy. Between the comfortable fit, discreet functionality, nearly a week of battery life and a ...

The arrival of the Oura Ring 4 has long been rumoured. Not least because its predecessor, the Oura Ring Gen 3, has been out for years. It seemed the company wasn’t in a rush to update its ...

Oura's got a new smart ring out. Let's talk about it. The release of the Oura Ring 4 brings the next generation of Oura's popular wearable to the market. Many tech reviewers, such as Mashable's ...