Search results

OK, I'll try this one: Suppose the number line from the first prime, 2, to infinity. Next consider 2 as a generator, and all the numbers in the set generated by 2 are thus not prime. So, we can drop this set from the number line. This would reduce the number line by half. However, since the...

I think I can prove this one: In the array [0, 1, 2, 3, 4, ... infinity], every 4th element is divisible by four, thus not a prime. "Every 4th element" is like a cycle. That leaves 3 elements in between the cycle that could possibly be a prime. The second element is divisible by 2, so it's not a...

Next, I can remove all the multiples of 10 (10, 100, 100000, etc): (10^y)^3 - 1, for any y, will be a number as 1 with many zeroes behind it. That number subtracting 1 will result in a number that is a bunch of 9's. The sum of the digits of that number will thus be a multiple of nine. All...

I suppose one could start by saying: if x is an odd number, then the cube will be an odd number. Every odd number that subtracts one results in an even number. Even numbers are not prime. So, this removes all the odd numbers. Next I have to figure out how to remove all the even numbers. Is...

I liked the python app he had, I still use it long after the course. I thought the course was interesting but not useful since they talk about building positions with many stocks which wouldn't work with a commission for each trade. But then I found motif investing, they let you put together a...

Crap, just got the email back, "not a match". In this case, the free courses have not helped me. Of course, can't expect employers to trust them much, but at least was hoping for the chance to go in and show work and projects I've done based on what I learned. Oh well, just have to pick up...

If you have an econ/finance degree, there might be certificate programs to add on to that for a discounted 'education is BS' experience. I've seen loads of job postings where they want something like 'business analytics' or 'data analysis' or 'big data' something. If you know statistics, I think...

Thanks for the helpful replies. dividend.com -- how funny, such an obvious site name that I never would of thought of it, kick myself ....

Is there a source for ex-dividend dates and amounts for the next 3-6 weeks (or more)? Currently I use this table in barrons: http://online.barrons.com/public/page/weekly-exdivident-dates.html but it is only for the upcoming week. thanks

Oh I see what you mean, sorry for giving a lecture. To qualify my post, sure it's easy to talk about how great a good fulfilling job is and wanting to work at one; but then it's a different story getting hired and accepted into one. If nothing else, if you show an attitude of trying and making...

I'm terribly sorry, but I disagree this is the reality of most Americans. I have worked several crummy jobs and 3 great jobs, in US and abroad, and even a crummy job but run by my best friends. I think the 'employer maximizes for least cost' vs 'employee minimizes for most pay' runs on another...

If they ban laptops, could you trade off a tablet or phone and look like everyone else? Maybe it's just a matter of fitting in, your coworkers complain to the boss, not you, and instead of talking to you directly, the best idea your boss can come up with is indirectly deal with the problem, and...

A few years ago, I saw a job posting that described buying and selling something Internet related, something like search ranking, or maybe ad space (sorry, my memory is not so good). The description said buying and selling on the order of seconds on an electronic platform, and trying to figure...

From what I've learned here and in my own attempts with indicators, here are a couple of things I've learned for evaluating indicators, I'll try to summarize some of the main points: - does it make sense? there are lots of ways to derive an indicator, doing all kinds of clever arithmetic and...

I used 'forex strategy builder' for a while, they're open source, the forum was pretty good at helping users. It's a full application you can use with the GUI, so would only need to look at the source to figure out something is calculated or performed, or add you own features. You can also code...

I found the best thing from the course is the QSTK package. The event study is very interesting. It draws the path of a stock from 10 or 20 days before your signal to 10 or 20 days after the signal -- but for as many stocks and instances as the signal is found. If you draw all the paths, it...

I watched this on youtube a couple of weeks ago: https://www.youtube.com/watch?v=TOBgPZFFlFY about evacuating the earth. It's always about spaceships leaving Earth, but are there any considerations of living deep in the ocean near hydrothermal vents, or deep underground? In the last...

I recall someone developed special gloves and boots to protect against fire ants. They have very long fuzzy hair. The way they work is the ants cannot get a good hold of the long hair, they fall off, so they cannot climb up to your calf (for boots) or up to your forearm (for gloves). They showed...

It's been my experience from taking some of the online 'MOOC' courses like coursera that there is one incredible advantage over in-class teachers: I can pause the video and take notes; pause to reflect on the preceding point; and I can replay the video over and over again until my brain can...

I think what happens is that the part of the sheet on the outer most of the fold has to curve around all the planes stacked in between. Another way to see: take a stack of 200 sheets of paper and fold in half, the innermost will be sticking out, the outermost will be stretched around the inner...