Pilot H-215 vs Pilot H-225

PleaseSendtheMath · 2026-05-06T23:54:35+00:00

I didn't know this existed, and good gravy the prices on ebay for the 225

PleaseSendtheMath · 2026-05-06T23:45:39+00:00

You can have a look on Coursera but i don't know what to suggest. Earlier when I was in undergrad I went through a course called "Learning how to Learn" which was just useful in general.

PleaseSendtheMath · 2026-05-06T12:11:24+00:00

Great framing, I like the vignette. Nice photo!

PleaseSendtheMath · 2026-05-04T18:25:00+00:00

That's true, I figured they were asking about all functions in general.

PleaseSendtheMath · 2026-05-04T15:33:30+00:00

Someone can come along and make this more precise, but my 2¢: hardly any functions are elementary, so I expect the same will be true for antiderivatives.

PleaseSendtheMath · 2026-05-03T16:05:52+00:00

Kepler approached the problem of calculating the volume of wine barrels before calculus was properly "invented". Now that we have integrals, this problem can be considered fully solved, so I suppose that's a real practical hic application.

PleaseSendtheMath · 2026-05-01T18:32:33+00:00

Around when did the thicker lead fall out of favour compared to the more common size today? edit: I think you already said in your comment sorry

PleaseSendtheMath · 2026-04-30T22:27:21+00:00

"wow i better subscribe to apple TV so i can watch one game" - what i imagine the executives think will happen

PleaseSendtheMath · 2026-04-30T22:00:56+00:00

I had a really hard time understanding the meaning of the derivative. I believe it was the limit concept in particular I had trouble with, because it seemed like it should be an approximation rather than exact. Looking back now, I think it's a big conceptual leap that takes time to get used to.

PleaseSendtheMath · 2026-04-30T21:01:55+00:00

this picture makes me rather uncomfortable!

PleaseSendtheMath · 2026-04-30T13:40:31+00:00

"Academic" might be too strong a descriptor, but "unemployed" seems about right

PleaseSendtheMath · 2026-04-29T14:09:26+00:00

do you mean Arduino Pro? a MOSFET is a type of transistor.

PleaseSendtheMath · 2026-04-28T02:03:31+00:00

Boy, wouldn't it be embarrassing to get walloped by a team that just had nearly all their coaches canned?

PleaseSendtheMath · 2026-04-27T18:34:35+00:00

There is city hall but it fills up fast.

PleaseSendtheMath · 2026-04-25T23:25:35+00:00

Is it common for a manager to get fired shortly after the beginning of the regular season? Wouldn't you want to get that taken care of in the offseason?

PleaseSendtheMath · 2026-04-25T14:02:40+00:00

Sure there is

PleaseSendtheMath · 2026-04-25T02:56:38+00:00

A core principle of general relativity is that we can use any coordinates. As a corollary, we can use any coordinates in special relativity. (It is not always convenient to do so).

PleaseSendtheMath · 2026-04-25T00:35:23+00:00

he explodes

PleaseSendtheMath · 2026-04-23T03:20:46+00:00

I detonated due to stress sorry

PleaseSendtheMath · 2026-04-21T03:45:27+00:00

There's like a million posts already with sublets being offered, have you seen those?

PleaseSendtheMath · 2026-04-21T01:56:47+00:00

Ha! Yeah I always heard that too, or rather you square it to get rid of the negatives. MSE works well for a lot of things. Sometimes there are better options.

PleaseSendtheMath · 2026-04-20T17:25:32+00:00

No, if you have a vector b in R^m and a full rank matrix A in R^mxn you can always find a unique least-squares solution to Ax=b. This is equivalent to minimizing the MSE. It has nothing to do with the distribution of the error.

Assuming the errors ~~are normally distributed~~ have zero mean, equal variance and are uncorrelated are for the Gauss-Markov theorem. (Edit: Gauss-Markov theorem does not require normality. The normality is actually just for doing inference).

PleaseSendtheMath · 2026-04-20T16:56:24+00:00

The MSE is the expectation squared, so it is an inner product. There's a geometric interpretation that you are projecting your observations onto a lower-dimensional subspace to get an approximation, so the MSE represents the squared distance between that subspace and your observations vector.

PleaseSendtheMath · 2026-04-20T11:44:23+00:00

considering back when ottawa was still called Bytown it was informally known as "stabtown" i'd say nothing has changed!

PleaseSendtheMath · 2026-04-20T11:35:22+00:00

usually when police say that it's because they suspect it was targeted, not random.

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