math

How to implement decision variable in AMPL

I have an equation and i don't know how to implement it in AMPL for CPLEX. Here is it: enter image description here Thank you for your help!

2022-01-25 03:50:07    分类:问答    math   modeling   ampl

找到 pi 的值直到 50 位(find the value of pi till 50 digits)

2022-01-25 01:20:56    分类:技术分享    java   math   pi

运动球从惰性球上反弹的角度(Angle that a moving ball will bounce off of an inert ball)

2022-01-25 00:47:51    分类:技术分享    java   math   physics   collision

C# 数学题：2 的最小幂比 X 大吗？(C# math question: smallest power of 2 bigger than X?)

2022-01-25 00:40:04    分类:技术分享    c#   math

查找特定值的最长序列(finding longest sequence of a particular value)

2022-01-25 00:33:22    分类:技术分享    algorithm   math

How to properly add/subtract a 128-bit number (as two uint64_t)?

I'm working in C and need to add and subtract a 64-bit number and a 128-bit number. The result will be held in the 128-bit number. I am using an integer array to store the upper and lower halves of the 128-bit number (i.e. uint64_t bigNum[2], where bigNum[0] is the least significant). Can anybody help with an addition and subtraction function that can take in bigNum and add/subtract a uint64_t to it? I have seen many incorrect examples on the web, so consider this: bigNum[0] = 0; bigNum[1] = 1; subtract(&bigNum, 1); At this point bigNum[0] should have all bits set, while bigNum[1] should have

2022-01-24 22:57:23    分类:问答    c   math   int128

我可以根据算术运算编写关系运算符吗？(Can I Write Relational Operators in Terms of Arithmetic Operations?)

2022-01-24 22:44:31    分类:技术分享    c++   templates   math   functor   relational-operators

找到具有无限多个解的非平方线性系统的所有解(Finding all solutions of a non-square linear system with infinitely many solutions)

2022-01-24 21:40:04    分类:技术分享    r   math   matrix   linear-algebra

SQL abs 计算 - 使用纬度和经度 - 数学！(SQL abs calculation - using latitudes and longitudes - MATH!)

2022-01-24 20:21:34    分类:技术分享    php   sql   math

Move a point toward the mouse

(I'm using processing for this but it is not necessarily relevant.) I'm looking for an algorithm that would take the point A and the point B (B being the mouse cursor position) and use them so that every frame the point A moves a little bit towards B (from -1px to 1px left/right up/down) I tried x1 += cos(atan((mouseY-y1)/(mouseX-x1))) and the same with sin for y1, but I doesn't seem to work. If someone has an idea I would appreciate it. I'm not looking for a built-in function that would do the job, I'd like to understand the math behind it. Thank you for your time.

2022-01-24 19:34:56    分类:问答    java   math   processing