第三个吻痕 - 何水水

We present explicit infinite families of twisted torus knots that are not fibered. Our approach relies on an explicit formula for the Alexander polynomial derived in our previous work. We show that the leading coefficients of the Alexander polynomials of twisted torus knots can take arbitrary integer values, which immediately yields infinitely many examples of non-fibered twisted torus knots.

随着水土保持理念的发展,近自然、近生态的治理措施越来越受到人们的关注,原来以干砌石为主的梯田形式也发生了变化,代之以生态、植物护坎治理措施,土工格室就是在这种时代背景下脱颖而出,因其独特的功能和效益,使其成为坡耕地治理中一个重要的治理措施。