I have an entire SageMath Jupyter Notebook devoted to Squiganometry. That is some fun stuff to play with!

Yes it is! Makes my little nerdy heart glow!

That is a thing of beauty! Unfortunately, I think I’d need to win the lottery. With the US dollar dropping against the Euro plus the tariffs, that little guy would be pretty damn pricey and only get more expensive as time goes on.

I looks and feels great, which makes it all the more frustrating that it is basically a downgrade from the previous model.

That is such a clever way to play with asymmetry on several different levels

As far as complex numbers go, the 991CW doesn’t add anything that most other flagship scientific calculators can do.

Sorry about that! I spoke from memory instead of checking my data first. The Trig functions are pretty middle of the pack, it’s the integration and the processor speed that are not that great. sum((e^{sin(atan(x)))}(1/3), 1, 1000) takes six minutes to run, but at least it completes. The Casio fx-991CW takes just over on minute, and even the TI-36X Pro only takes four minutes.

That is a beautiful picture of a beautiful calculator! I love mine, too, but it does fall down rather quickly in some of the trig and differentiation edge cases.

SageMath is my go to for heavy math.

Nothing will ever hook me as badly as Kerbal Space Program did. If I wasn’t at work, I was playing Kerbal for five years straight. No breaks, didn’t play anything else during that time. Once I got RealSolarSystem and RealismOverhaul working, you couldn’t pry me away from the computer. I put in aver 10,000 hours, easily.

Happy to help!

It’s a lovely pen, and I just bought one myself! The trick to getting a full-ish fill is to dunk the nib in the ink and rapidly push on the button about eight or nine times. You’ll feel a difference in the button action when it gets as full as it is going to. The button will give a bit of resistance at that point. I don’t remember if mine got completely full, but I know that it holds a decent amount of ink. I hope that helps!

You can’t increase the font size, but it is larger than the HP Prime and TI nspire CXII on large font.

I just dug through the offerings of all of the niche calculator manufacturers I can think of and came up empty handed. What I would recommend in your case is the Casio fx-CG50, though. It has rubber pads on the back of the case and enough heft that it doesn’t move when placed on a desk and used one-handed. The screen is easily visible from most angles and it has the largest font of all of my graphing calculators.

Most chemicals that are gasses this close to the sun are solids that far out. Carbon dioxide freezes at just -79 C at one atmosphere of pressure. The energy coming in from the sun would not be enough to keep good greenhouse gasses from precipitating out of the atmosphere.

That is definitely a well used little device! Coincidentally, the last calculator that I bought a couple of months ago is the EL-501X2, the most recent iteration of the model. Not a bad little calculator as long as you stay away from the edge cases! The edge cases are where the fun stuff is for me, cause I really like finding out where these machines tip over.

Optimus Prime, and he is phenomenal!

It is supposed to be a capital A on top of a couple of corner braces. If you press SHIFT it turns into an S. On the fx-9750GIII you can use both upper and lowercase and the cursor has a lowercase a when in lowercase alpha mode. That said, it is pretty much a dong.

Thank you, @[email protected]! I was way more worried that I was doing something wrong than anything else. Both the Lamy 2k and Sailor inks are highly regarded, so I’m the weakest link here. I had no idea that the Manyo inks would change like that, but now that I know I’ll see it as something to appreciate instead of panic over. Thanks, again!

That was a fascinating find! Thank you for sharing it! I would have figured that the calculator would have been the focal point of the in-class demonstration, but they really showed it as being a supplement to the lecture. Great little time capsule!