Give me an example of how infinity is used, to put a satellite into space..... 

So I googled "infinity in practical math" and this was the top result. There's a couple of examples of where it is used. Again, I'm not a mathematician so I won't pretend I understand it. But I am going to say that it's clearly bullshit to say that it isn't rational to use it. There's like, at least 5 examples just in that random thread on the internet and they clearly aren't all of them. Did you watch the Vi Hart video? Do you think she just made up all those things and pulled them out of her ass? You think someone just had a giggle when they came up with concepts such as cordinals, Aleph Null, Big Omega and so on? Clearly these are real things. 

Give me an example of how infinity is used, to put a satellite into space..... 

Last edited by Deanstar; 09012014 at 12:18 AM.
Here is a video that talks about some example math problems using infinity. 

If I may chime in for a moment, in the standard model of physics, you encounter infinities in energy potentials during certain particle collisions. This was one of the reasons for one of the founders of the model, Paul Dirac to be convinced that it must be wrong for he thought that no theory so ugly could be the way nature really is. String theory apparently resolves that issue but cannot be tested yet until we have particle accelerators far more powerful than even the large hadron collider. 

Hey Deanstar it looks like you still can't argue one thing at a time and you have to keep finding different reasons to deflect, like the fact that I supposedly went in "overdrive". What does that have to do with any of my points? Logic and reasoning are not something that require being all knowing, where are you getting this idea? Logic and reasoning are the labels we gave to the mental processes we use as tools in analyzing the world around us. They are human concepts, and so require having equal intelligence as human beings and to be able to live the human experience to understand. Nothing about being all knowing. In fact if you were all knowing, you wouldn't need to use logic or reasoning to understand your reality. You already know everything. Logic and reasoning exist solely for the purpose of gaining knowledge. Please explain how I am wrong, and don't just ignore what I say, or say you already told me, because you haven't. You can't just claim something and not explain how you came to that conclusion and why it is more correct than somebody else's. You seem really good at avoiding that last part because it's just so damn inconvenient. 

Interesting thread. I'm nervous to contribute. ... but ... 

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That is very interesting. That would suggest God brought us into being to give him purpose so perhaps God was suffering from existential nihilism at some point. I'm not saying for a moment I believe it but thank you for sharing your experience nonetheless. 

Hi DeviantThinker 

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Thank you EbbTide. That is beautiful. It is kind of what I was saying to someone else on another thread about hate. 

You don't need infinity to calculate the speed of something...... 

Last edited by Deanstar; 09012014 at 09:45 AM.
Okay, let me try explaining it another way. Often time in math when you have variables that change you put those on a math grid. That way you can easily see how the variable changes in relationship with each other. For example you have Y = x +1. You plug in 1 for Y and x is equal to 0. If you plug 2 in for Y, x is equal to 1. If you plug in 3 for Y, x is 2. There is a relationship between X and Y. Pretty much everything can be put into some type of formula and they can be very complex. 

So if you don't need logic unless your ignorant, then why when you know things does logic become useless? If you can't define it fully when ignorant, what better use is it if when you know everything it's useless anyway? Your reasoning goes something like "I'm not completely knowing, so I'm using logic to become wiser. If I was all knowing then I would not use the same logic. 

Last edited by Deanstar; 09012014 at 11:21 AM.
How would you write a third as a decimal number if infinity is useless? 

Deanstar I've talked to you yesterday in private messaging and suggested you not reply any more, to which you agreed. But since then you've written at least half a dozen posts, I feel I should go ahead and try again, this time publically: 

Do you ever write a decimal number that goes on forever? Does any calculator? Or do you write it to about 1 or two decimal places? If you divide a pie into 3 parts, do you need infinity to make sure everyone gets a fair slice? Infinity is in everything so you could technically claim that any calculation 'needs infinity' but is it realistic to use it in any maths problem? Not that I know of unless you are doing some weird type of maths philosophy. But I couldn't see any practical use. 

Last edited by Deanstar; 09012014 at 04:13 PM.
Yes. We have a specifc way to do it. You use an ellipsis: 0.555... is different from 0.555. 

Last edited by Maeni; 09012014 at 04:17 PM.
The math is used all the time in engineering and science. You can pretend all you want that it isn't used but you are totally wrong. Another example is if you have some irregular shape and you want to find the volume of that shape, how do you do it? Let's say you want to find the volume of a potato. How do you do that? For a cube it is easy, you multiple the length of each side together. However there isn't any formulas for finding the volume of a potato. You could drop the potato in a bucket of water and measure the amount of water that spills out but that isn't practical for everything. What if you want to measure the volume of a car, or a mountain. What if you want to find how much water is in a lake? 

How did this thread get turned into a math argument? 

You didn't listen to what I just said about it. It does not matter about infinity here cause you are not using infinity in a maths problem. That is just a simple division... infinity may be part of the answer, but you don't need to use infinity as a maths problem. If it makes you happy. 0.333 does go on forever, goes on for infinity. Who cares? You don't need to use infinity in 1 divided by 3...not in laymans terms. 

Your understanding of math is flawed. Just because an equivalent value that happens to be a rational number exists, that does not mean infinity is not part of the math problem. Any time you deal with math, infinity is part of the problem. I mean if you really want to you could write it off as layman's terms, but the purpose of saying things in layman's terms in the first place is literally to oversimplify a complex idea that one otherwise could not understand because he or she simply does not get it. That doesn't mean by any means that the simplification is no longer a simplification. 

Last edited by snoop; 09012014 at 04:34 PM.
How did this thread get turned into a math argument? This line of discussion has nothing to do with the topic. If you want to argue it further, make a thread about it please. 

Why do you demand that maths is about laymans terms, that math has to be about cutting slices of cake and being "practical"? Math is a lot of things, and you definitely need infinity in a math problem, like for example proving that 0.333... * 3 is 1. Normally you might argue that well, isn't 0.333... * 3 just 0.999... ? And yes indeed it is but proving that 0.999... = 1 requires infinity and that is a maths problem. 

a potato does not have an infinite volume, neither does anything you measure. If you really think that infinity is used, why can't you demonstrate a equation in which it's useful? I'm being skeptical so show me how infinity would solve a problem. 

I don't take bait, so I don't have anything to say to this. But I'm guessing from the last part you missed my post about numbers, which is okay as I'm going to make a new post. Let me introduce you to the (practical) wonders of infinity! 

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