If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Help
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, withing 24 hours on weekdays.
Customer service
All questions about your order, return and delivery must be sent to our customer service team by e-mail at yourstore@yourdomain.com
Sale & Press
If you are interested in selling our products, need more information about our brand or wish to make a collaboration, please contact us at press@yourdomain.com
Dannaya rabota posvyashchena issledovaniyu trekh problem: korrektnost' postanovok nelokal'nykh granichnykh zadach dlya psevdodifferentsial'nykh uravneniy, spektral'nye voprosy, svyazannye s psevdodifferentsial'nymi operatorami, obobshchenie klassicheskogo printsipa Dyuamelya na sluchay differentsial'nykh uravneniy drobnogo poryadka. Kniga sostoit iz trekh glav. V pervoy glave predlagayutsya korrektnye postanovki nelokal'nykh granichnykh zadach dlya obshchikh neodnorodnykh psevdodifferentsial'nykh uravneniy v prostranstvakh Soboleva, Besova i dr. Vo vtoroy glave izuchayutsya usloviya diskretnosti spektra obshchego, voobshche govorya, nesamosopryazhennogo psevdodifferentsial'nogo operatora v gil'bertovom prostranstve. V tret'ey glave predlagaetsya odin iz vozmozhnykh variantov obobshcheniya printsipa Dyuamelya dlya sluchaya differentsial'nykh uravneniy drobnogo poryadka, pozvolyayushchiy zadachu Koshi dlya neodnorodnogo uravneniya neposredstvenno svodit' k zadache Koshi dlya sootvetstvuyushchego odnorodnogo uravneniya. Na osnovanii drobnogo printsipa issleduetsya razreshimost' zadachi Koshi dlya neodnorodnykh differentsial'nykh uravneniy drobnogo poryadka.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer,
birth defects, or other reproductive harm.
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⚠️ California Proposition 65 Warning: Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
