人员、任务、进度、工时、周期、依赖关系 一目了然。无论项目大小、简单复杂都能轻松管理
这次 Microsoft 和 Apple 都令人恼火!
Group presentation is a method to express groups as a quotient of a free group and a normal subgroup. In a presentation, there are generators and relators, and the presentation yields a ‘minimalist implementation’ of these generators and re
理想(ideal)是出现在抽象代数(更特别地,环论)中的一类对象,其命名很有渊源。之前我只知道这个名字来源于一位数学家研究惟一分解时引入的“理想数”(该研究的思路和一般化最终形成了现代数学语言中“理想”的定义),但是具体的细节不是很明白;最近在阅读基于格(lattice)的密码学的内容,其中提到了环上的格(ring lattice),其中提到了理想格(环的一个子集,同时满足格和理想的要求),好奇心一发不可收拾,读了一些数学历史故事,对“理想数”加深了认识,记录下来以飨观众。文
A brain teaser that remains open in Yao class WeChat group, up to the time of writing of this entry. See if it interests you and if you can solve it.
I’m taking an algebra course and regaining my algebra sense (non-sense?). Familiar to us is that direct products [resp. sums] of groups [resp. abelian groups] possess their versions of universal properties. When reviewing these things, I we
Issue #6799 in PowerShell repository on GitHub raises the question why Previous Versions is opening previous versions of a directory in PowerShell, instead of File Explorer as expected. The reason is that PowerShell 6.1.0 (preview) installe
日历是一个很棒的时间管理工具,作为学生,一个常见的需求是把课程表导入日历。这就引出了好几个需要考虑的问题。我经过几个学期的摸索,实现了一个对自己完全够用的日历管理工具。
Outlook 2016 GUI always creates an event with at least one attendee, which makes Outlook.com and Outlook for iOS have difficulty correctly interpreting the appointment. Instead, they think it is a meeting. However, if you create the event w
一回想过去,就很容易觉得生命都过得不够充实。今天早晨偶然想要看一下自己的原来的卧室,感觉就上来了。
Continuing ‘Hosting a preview handler in WPF, part 1: UI and file associations’, we will do the major COM interop in this entry. Many people have failed to host the handler correctly because of careless implementation, so look carefully! Al