Recent content by murshid_islam

What are some good arguments against mathematics being discovered (or for it being invented)?

The range of sin(x) is the interval [-1, 1], which is also the domain of arccos(x). I'm not being able to figure out how that will affect ##\mathrm{d}u##. What will ##\mathrm{d}u## be if ##u = \arccos(\sin x)##?

Ok, I tried it with integration by parts with ##u = \cos^{−1}(\sin(x))## and ##\mathrm{d}v = \mathrm{d}x##, which gives us ##\mathrm{d}u = \frac{−\cos(x)}{\sqrt{1−\sin^2 x}}\mathrm{d}x = −\mathrm{d}x## and ##v=x##. The integral becomes ##x\cos^{−1}(\sin(x)) + \int x \mathrm{d}x =...

Here's the problem: ##\int_0^{2\pi} \cos^{-1}(\sin(x)) \mathrm{d}x## If I do the substitution ##u = \sin(x)##, both the limits of integration become 0 and the integral would result in 0. But the graph of the function tells me the area isn't 0. Where am I going wrong?

TL;DR Summary: Is "Quantum Mechanics Demystified" a good book for a beginner for self-studying? I'm a layman with background in high school physics and undergrad calculus. Is "Quantum Mechanics Demystified" by David McMahon a good book for self-studying and learning quantum mechanics?

Thank you.

I went to his Wikipedia page. It has a list of his published books. I wanted to see a list of his research papers. Any idea where I can find that?

Unfortunately, it was a random facebook comment (which made me curious) that I noticed while scrolling. I don't have a link.

Just saw a claim online that "Dawkins isn't a recognized scientist", which seemed like a strange claim. It made me wonder: how much research did Dawkins do over the years? Can you provide some references to his list of researches?

Has there been any case where the brain function stopped and the patient later came back to life?

Is this the one: https://www.bmj.com/content/378/bmj.o1831?

Yes, that's one of the types I am talking about. A slightly different case that I am also interested in is where someone's heart stopped and then started again spontaneously without medical intervention. This is the one I am interested in. Before the revival, the individual is dead. They just...

Can you share some more details about that case?

Google didn't help much. The results were about near-death experiences, and from sources like buzzfeed, boredpanda etc. Any ideas on how to narrow down the search? Edit: Just found out about Lazarus Syndrome.

I am looking for cases (if any) where patients were pronounced dead by doctors and then came back to life. Are there any such cases? I am not looking for cases of near-death experiences. I'm also not looking for cases where patients were mistakenly declared dead when they were still alive.