Collatz 3x +1和广义px + q问题中非平凡环大小的新下界
New lower bounds for the size of a non-trivial loop in the Collatz 3x+1 and generalized px+q problem
摘要:
在Collatz 3x +1问题中,有三种可能性:从任何正数开始,我们要么到达平凡循环(1,4,2),要么结束于非平凡循环,要么直到无穷大。在本文中,我们将证明,如果一个非平凡的循环有m个奇数存在,那么它的最小奇数是有界的一个函数的m。我们还将使用该界限来计算存在非平凡循环所需的最少奇数元素数。并给出了px + q问题的广义界.
英文摘要:
In the Collatz 3x+1 problem, there are 3 possibilities: Starting from any positive number, we either reach the trivial loop (1,4,2), end up in a non-trivial loop, or go until infinity. In this paper, we shall show that if a non-trivial loop with m odd numbers exists, then its minimum odd number is bounded above by a function of m. We shall also use that bound to calculate the least number of odd elements required for a non-trivial loop to exist. Also, the generalized bounds for the px+q problem are given.
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