{"product_id":"9781461429692","title":"Nonelliptic Partial Differential Equations: Analytic Hypoellipticity and the Courage to Localize High Powers of T","description":"\u003cp\u003eThis book provides a very readable description of a technique, developed by the author years ago but as current as ever, for proving that solutions to certain (non-elliptic) partial differential equations only have real analytic solutions when the data are real analytic (locally). The technique is completely elementary but relies on a construction, a kind of a non-commutative power series, to localize the analysis of high powers of derivatives in the so-called bad direction. It is hoped that this work will permit a far greater audience of researchers to come to a deep understanding of this technique and its power and flexibility.\u003c\/p\u003e","brand":"Springer New York","offers":[{"title":"Default Title","offer_id":47031047520496,"sku":"9781461429692","price":149.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/9781461429692_p0.jpg?v=1763673757","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/9781461429692","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}