Title
Psevdo differentsial'nye uravneniya i ikh prilozheniya: Korrektnye postanovki zadach, issledovanie spektra psevdodifferentsial'n,Used
Delivery time: 8-12 business days (International)
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.
By changing our most important processes and
products, we have already made a big leap forward. This ranges from the
increased use of more sustainable fibers to the use of more
environmentally friendly printing processes to the development of
efficient waste management in our value chain.
⚠️ WARNING (California Proposition 65):
This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, please visit www.P65Warnings.ca.gov.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Shipping & Returns
Shipping
We ship your order within 2–3 business days for USA deliveries and 5–8 business days for international shipments. Once your package has been dispatched from our warehouse, you'll receive an email confirmation with a tracking number, allowing you to track the status of your delivery.
Returns
To facilitate a smooth return process, a Return Authorization (RA) Number is required for all returns. Returns without a valid RA number will be declined and may incur additional fees. You can request an RA number within 15 days of the original delivery date. For more details, please refer to our Return & Refund Policy page.
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Warranty
We provide a 2-year limited warranty, from the date of purchase for all our products.
If you believe you have received a defective product, or are experiencing any problems with your product, please contact us.
This warranty strictly does not cover damages that arose from negligence, misuse, wear and tear, or not in accordance with product instructions (dropping the product, etc.).
Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.
Secure Payment
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
We accept payments with :
Visa, MasterCard, American Express, Paypal, Shopify Payments, Shop Pay and more.