Cauchy Problem For Diferential Operators With Double Châcteristics- Free

I received this book at a free sharing forum, accidentally shared it here, but after sharing it I realized that my actions may violate copyright law. I emailed it to admin asked to delete the post, and a topic was created asking to delete the post, but the emails were admin@lamchame.com, admin@lamchame.vn, sale@lamchame.com, vuongthoa@lamchame.com, vuongthoa@lamchame.vn, support@lamchame.com I did not receive the letter, so I asked for permission to edit the article, and sent my apologies to the author and publisher, hoping to forgive me. I would like to edit the article and promise not to make the same mistake again. Thank you very much