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
V knige izuchayutsya differentsial'nye uravneniya vtorogo poryadka, dopuskayushchie negladkie, a takzhe razryvnye resheniya. Ustanavlivayutsya polnye analogi klassicheskikh ostsillyatsionnykh rezul'tatov Shturma (chislo nuley, ikh peremezhaemost' dlya sobstvennykh funktsiy). V osnove analiza lezhit utochnenie integrala Stilt'esa. Za schet rasshireniya ponyatiya integrala udaetsya sokhranit' potochechnoe tolkovanie kak resheniy, tak i sootnosheniy, chto v ramkakh teorii obobshchennykh funktsiy bylo by nevozmozhno.
⚠️ 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.
