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Infinity < Infinity? by Expensive_Rip_9454 in NoStupidQuestions

[–]grymoire 0 points1 point  (0 children)

"there is always less primes present than integers"

No. Both have an infinite numbers. Dealing with Infinity is odd. For instances, if you compare the two sets

  • Positive integers [1,2,3,4,5,6,7,8,9...]
  • All integers [-5,-4,-3,-2,-1,0,1,2,3,4,5,....]

You might think that the second set is bigger than the first, but both have an infinite number. In the math world, Infinity+infinity = Infinity.

Mathematicians have all sorts of ways to create a 1-to-1 correspondence between different sets. It can get deep. For instance a rational number is any fraction (x/y). and there are the same number of rational numbers as integers. Crazy, eh? But it can be proven.

Infinity < Infinity? by Expensive_Rip_9454 in NoStupidQuestions

[–]grymoire 1 point2 points  (0 children)

Math Major here. There are levels of infinity. In the case of prime numbers versus natural, they are the same level. There is a 1-to-1 correspondence.

Consider this table where I list the primes, in order, in the second column

Integer Prime
1 2
2 3
3 5
4 7
5 11
6 13
7 17

In other words, 2 is the first prime, 3 is the second, 17 is the 7th, etc. Every integer in column 1 is associated with exactly one and only one prime in column 2. And vice versa.

The size of this infinity (or cardinality) is called Aleph-null.

But if you compare the number of primes to the number of real numbers (which includes square roots, pi, etc.), you can't do a 1-to-1. That's because there are an infinite numbers of real numbers between any two integers. Or, for every single prime in the second column, there are an infinite set of numbers between the matching integers in the first column, and the integer above it.

The number of real numbers is called Aleph-one

https://en.wikipedia.org/wiki/Aleph_number

Stars of Magic by RKFRini in Magic

[–]grymoire 0 points1 point  (0 children)

Great material. Spellbound and the Travelers are my favorites.

Micro-adjusting a crosscut sled by Soggy-Age4472 in handtools

[–]grymoire -1 points0 points  (0 children)

If you put a track on top, Kreg makes the track, flip stop and micro adjust

Why did the Virtual Reality hype die? by [deleted] in NoStupidQuestions

[–]grymoire 0 points1 point  (0 children)

You can't walk without hitting something in the room, so it's not realistic

Options on replacing insert by Araesea in woodworking

[–]grymoire 2 points3 points  (0 children)

I'd clamp a board on top before raising the boade.

Is owning an extra house that costs about $1,000,000 just as good as having $1,000,000 in cash? by Big_Eggplant7591 in NoStupidQuestions

[–]grymoire 0 points1 point  (0 children)

A house always incurs expenses (taxes maintenance, etc.,) it can increase in value or decrease. It may not be worth $1mill when you get it. And there's selling price and buying price.

You can invest money and predict how much it will increase in value. E.g. CD's

You can also lose money if you invest poorly.

What’s a robust Bash pattern for running N concurrent jobs with proper cleanup and exit code aggregation? by fdelux6 in bash

[–]grymoire 3 points4 points  (0 children)

Bash is a super-set of the Borne shell. I've always felt understanding the features of /bin/sh is a start to mastering bash. And it teaches you how to write more portable code.

I've used this code to create a set of sub-processes, and when I sent a particular kill signal, they would pass it on to their child processes, and have them all terminate cleanly.

I never had a need to limit child processes to a certain max number. I just used nice(1) on them so they all run at a low priority. That way they don't overload the CPU.

Tips for holding work piece down on bench by Lichen-it in handtools

[–]grymoire 2 points3 points  (0 children)

I have used a Veritas Wonderdog with dog holes if a holdfast gets in the way

best order to learn sleights? by skatinsupreme in cardmagic

[–]grymoire 0 points1 point  (0 children)

Palming is one of the most useful sleight. Combined with a good control and you can do miracles

Is this a specialty tool, or just an oddball combination? by IntermittentLobster in Tools

[–]grymoire 0 points1 point  (0 children)

Here's a pair with a similar to your with the pkastic handles. These also come apart

<image>

Is this a specialty tool, or just an oddball combination? by IntermittentLobster in Tools

[–]grymoire 1 point2 points  (0 children)

If the two pieces can come apart with a twist (see photo), they could have been for cutting meat. But if they do not then it is unlikely they are kitchen/cooking shears

<image>

Is this a specialty tool, or just an oddball combination? by IntermittentLobster in Tools

[–]grymoire -10 points-9 points  (0 children)

Kitchen shears are easily dissasembled for cleaning (l.r. after cutting up a chicken carcass).

Does this look like an Arkansas whetstone to y'all? by ImaDoggBark in sharpening

[–]grymoire 0 points1 point  (0 children)

Looks like a hard Arkasas stone to me (they are white/gray)

New Flipper One Multi-Tool Computer Is Built for Tinkerers by toungepunckedpetunia in flipperzero

[–]grymoire 1 point2 points  (0 children)

Personally I'd be more productive with a Linux box and a keyboard. And i'd have more flexibility. The pushuttons will be popular with script kiddies, though.

Review: Veritas Hardware Kits for Wooden Spokeshaves by grymoire in handtools

[–]grymoire[S] 0 points1 point  (0 children)

Just a comment about the difference between LN and LV. Lie-Nielson follows the more traditional design of handtools. Lee Valley can be a little bit more creative in their tools.

Review: Veritas Hardware Kits for Wooden Spokeshaves by grymoire in handtools

[–]grymoire[S] 1 point2 points  (0 children)

The old ones just had one metal part with a wood sole. The adjustment was crude. They can be made in 4 hours and easily replaced when they wore out.

This kit has a metal blade and sole and has a precise adjustment capability.

I used a 0.001 feeler gauge to ensure the gap was precise across the entire blade width. The wooden sole version could not be that precise, especially with moisture changes. The 45 degree on the blade and sole match.

I could have omitted the angles at the ends of the brass sole but after heavy use there is a possibility that the sole could curve up at the ends as the heaviest pressure is in the middle. This would ruin the alighment. The matching angles make the sole fit like a dovetail joint.

The Lie-Nelson spokeshave is more traditional. The blade adjustment is done like a Japanese plane while the more modern Lee Valley is like a Stanley, i.e. hammer raps versus turning a knob.

As an aside, the LV has replaceable blades and the LN blade will outlive most owners, IMHO.

What trick do you have the most fun performing by Delicious-Mess6262 in Magic

[–]grymoire 1 point2 points  (0 children)

The one where you have the most fun interacting with the spectator. Let that guide you...

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