It is possible to speak of a polynomial ring in an infinite set of variables, provided it is assumed that any individual polynomial depends only on a finite number of variables. Seamless Wikipedia ...

In ring theory, a branch of mathematics, a ring R is a polynomial identity ring if there is, for some N > 0, an element P ≠ 0 of the free algebra, Z X1, X2, ..., XN , over the ring of integers in N ...

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 ...

I’ve made no secret about wearing the Oura Ring smart ring for many years. I am definitely a fan of the product, as is made clear by this longevity, but don’t take this to mean I’ll go easy ...

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 ...

Looks and feels more like jewelry than ever. New Smart Sensing platform makes the ring more accurate and easier to wear. Updated app with interesting new features. Better battery life. Both ...

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 ...