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Mastering Mathematics and Computer Science

I am trying to put down a list which will enable one master mathematics (self study).  Initially this is a random list of links, but will be organized subsequently based on skill level. Mastering Mathematics 1.  Algebra, Algebra 2, AP Statistics, Calculus, Calculus 2, Geometry, Pre-Calculus, Trigonomery http://www.profrobbob.com/home UMKC: Richard Delaware College Algebra:  https://www.youtube.com/playlist?list=PLDE28CF08BD313B2A Calculus 1 -  https://www.youtube.com/playlist?list=PLF5E22224459D23D9 2. NPTEL Core Mathematics 1 (sem 1 and sem 2) https://www.youtube.com/playlist?list=PL3A87B93CB9912EC1 Mathematics in India (from Vedic Period to Modern times) https://www.youtube.com/playlist?list=PLbMVogVj5nJThf31TNSQzuN7zqxe7HdRN Probability and Statistics https://www.youtube.com/playlist?list=PL6C92B335BD4238AB Mathematical Logic https://www.youtube.com/playlist?list=PL2EB5662A0D455A81 Mastering Computer Science MIT: Mathematics for Computer Science https:/

C# Abstract Class Vs. Interface - Building a simple rule engine

In this video post we will briefly go over the difference between abstract class and an interface.  This is one of the most confusing concepts for beginners to understand. In the following video we will walkthrough step by step through these concepts and build a simple RuleEngine as a demo. Please do note that this rule engine is not fully functional and production ready, but is demonstrated to make the concepts clear. Please leave your constructive comments and also suggestions about future videos, if you like to have on any specific topics.