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Warning: file_put_contents(): Only 4096 of 7307 bytes written, possibly out of free disk space in /var/www/group-telegram/post.php on line 50 Непрерывное математическое образование | Telegram Webview: cme_channel/3984 -
а) Пусть есть набор фигур полимино, каждая умещается в квадрат 10×10. Докажите, что если копиями этих фигурок можно замостить область, содержащую квадрат сколь угодно большого размера, то можно ими замостить и всю плоскость.
б) Существует набор фигур (уже не клеточных), каждая умещается в квадрат 10×10, копиями которых можно замостить область, содержащую квадрат сколь угодно большого размера, но нельзя замостить всю плоскость.
а) Пусть есть набор фигур полимино, каждая умещается в квадрат 10×10. Докажите, что если копиями этих фигурок можно замостить область, содержащую квадрат сколь угодно большого размера, то можно ими замостить и всю плоскость.
б) Существует набор фигур (уже не клеточных), каждая умещается в квадрат 10×10, копиями которых можно замостить область, содержащую квадрат сколь угодно большого размера, но нельзя замостить всю плоскость.
BY Непрерывное математическое образование
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One thing that Telegram now offers to all users is the ability to “disappear” messages or set remote deletion deadlines. That enables users to have much more control over how long people can access what you’re sending them. Given that Russian law enforcement officials are reportedly (via Insider) stopping people in the street and demanding to read their text messages, this could be vital to protect individuals from reprisals. The Securities and Exchange Board of India (Sebi) had carried out a similar exercise in 2017 in a matter related to circulation of messages through WhatsApp. Telegram has gained a reputation as the “secure” communications app in the post-Soviet states, but whenever you make choices about your digital security, it’s important to start by asking yourself, “What exactly am I securing? And who am I securing it from?” These questions should inform your decisions about whether you are using the right tool or platform for your digital security needs. Telegram is certainly not the most secure messaging app on the market right now. Its security model requires users to place a great deal of trust in Telegram’s ability to protect user data. For some users, this may be good enough for now. For others, it may be wiser to move to a different platform for certain kinds of high-risk communications. At its heart, Telegram is little more than a messaging app like WhatsApp or Signal. But it also offers open channels that enable a single user, or a group of users, to communicate with large numbers in a method similar to a Twitter account. This has proven to be both a blessing and a curse for Telegram and its users, since these channels can be used for both good and ill. Right now, as Wired reports, the app is a key way for Ukrainians to receive updates from the government during the invasion. READ MORE
from vn
