Песочная модель. Лекция 1
Лекция- Математика
Песочная модель представляет собой связный граф, в вершинах которого лежат песчинки. Как только число песчинок в вершине v становится больше или равно числу рёбер, выходящих из v, эта вершина отдаёт каждой из соседних вершин по одной песчинке, такая операция называется обвалом. Хотя бы одна вершина в графе объявляется стоком: там мы обвалов не делаем, можно считать, что все песчинки, туда попадающие, исчезают из системы. Несложно показать, что из любой начальной конфигурации песчинок в вершинах операциями обвалов можно прийти к стабильной конфигурации — где обвалов сделать более нельзя — и что эта финальная конфигурация определена однозначно.
Песочная модель была придумана несколько раз в разных контекстах и таит множество открытых вопросов с красивыми картинками.
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@wordle today, Подскажите, пожалуйста, в приведенном выше задании как нужно было правильно рассуждать, чтобы сделать вывод о том, что функция выпуклая вниз? Я немного не поняла.
retro bowl is a great game to spend the time after a tough day at work if you like to come over and play with me.
Я уверен, что на написание этого поста ушло много времени и сил. Если вы хотите хорошо провести время, попробуйте играть в Subway Surfers и quordle онлайн с друзьями и семьей. Это не разочарует вас.
Я уверен, что на написание этого поста ушло много времени и сил. Если вы хотите хорошо провести время, попробуйте играть в Subway Surfers и quordle онлайн с друзьями и семьей. Это не разочарует вас.
There are a lot of interesting games available on the internet; one of my favorites is stumble guys, a knockout game that puts boys' wits to the test.
There are a lot of interesting games available on the internet; one of my favorites is stumble guys, a knockout game that puts boys' wits to the test.
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