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‘Symmetry’ has a special meaning in physics. A picture is said to be symmetrical if one side is somehow the same as the other side. Precisely, a thing is symmetrical if one can subject it to a certain operation and it appears exactly the same after the operation. For example, if we look at a…

Every person in the world likes to enjoy and leads his/her life happily. There are many ways to enjoy, and the first among them will definitely be a vacation or traveling to the world’s beautiful and historic places to admire the beauty of nature and get away from his daily routines. In this busy life…

It was mid 2012, the first time I installed TeXstudio version 2.3, on my PC. ‘Peaceful‘ was the word I used to describe it then after. TeXstudio has now gradually inched to version 2.12.22 and by time being even more peaceful and wonderful. Wonder why did I call it ‘peaceful’? Writing LaTeX is a real pain, when you are willing to…

How many weeks are left before your final exams? Are you ready to score memorable grades? If not, you may just have to wait another 12 months to re-take exams and no student wants that to happen. GCSE students who fail won’t be able to pursue A-levels, and A-level students who fail (or get low…

If you are starting a blog then WordPress can be an exciting platform because it’s free, user-friendly and has a variety of plugins that give you many options. It is also known to be a powerful content management system, which is an added advantage. Moreover business owners and individuals alike can benefit from it because…

Square Integrable function or quadratically integrable function $\mathfrak{L}_2$ function A function $y(x)$ is said to be square integrable or $\mathfrak{L}_2$ function on the interval $(a,b)$ if $$\displaystyle {\int_a^b} {|y(x)|}^2 dx <\infty$$ or $$\displaystyle {\int_a^b} y(x) \bar{y}(x) dx <\infty$$. For further reading, I suggest this Wikipedia page. $y(x)$ is then also called ‘regular function’. The kernel…

It is so fun and enjoyable to travel through rail routes. Most people love to travel by rails instead of preferring to travel by car. Traveling by rail is a good experience along with watching the beauty of nature and different sceneries when you travel long distances. Many people believe that it is safe to…