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micromass submitted a new PF Insights post
Questions About Infinity
Continue reading the Original PF Insights Post.
Questions About Infinity
Continue reading the Original PF Insights Post.
It depends. It could be anything in between, depending on the situation.mrnike992 said:Semi-relevant and interesting problem I stumbled across the other day: If you have an infinite number of infinitely small objects, would it take up near-zero volume or infinite volume?
You will have to define "infinitely small" objects. I suspect you mean "infinitesimal" but the answer can be either of those (or a non-zero finite number) depending on exactly how those infinitesimal objects are defined.mrnike992 said:Semi-relevant and interesting problem I stumbled across the other day: If you have an infinite number of infinitely small objects, would it take up near-zero volume or infinite volume?
No. It's not a number at all, either real or complex. Infinity is more of a concept than a number.Hamza Abbasi said:(Y) Wonderful ! I have a question if infinity doesn't fall in the set of real number than ever do it stand ?? Umm complex no?
dryangore said:I get frustrated when anyone talks about infinity as if it is something that actually exists rather than something that a variable tends towards.
So, despite my rude way of arguing my point, you can see why I don't want mathematicians to waste their time with logically inconsistent concepts such as the infinite or infinitesimal.
Another argument against the infinite (or in this case infinitesimal) is a slight variation on Zeno's paradox. "If a person walks from one side of a room to another, they must first move halfway there, and then they must move halfway between that point and the other side of the room. They must keep making this division in space and if they do (if they could) they would never reach the wall on the other side of the room.
This suggests, that whether it is a result of space being discrete at some level, or a result of the motion of the object and how its kinetic energy is defined being discrete, that at some point our reality gives up on the infinite, and just allows the object to move to the next position. I would suggest this is true in any reality, no matter how finely a variable is allowed to be describes, it has to stop somewhere.
dryangore said:In the real world nothing will ever reach infinity.
dryangore said:So, despite my rude way of arguing my point, you can see why I don't want mathematicians to waste their time with logically inconsistent concepts such as the infinite or infinitesimal.
dryangore said:I get frustrated when anyone talks about infinity as if it is something that actually exists rather than something that a variable tends towards.
dryangore said:I get frustrated when anyone talks about infinity as if it is something that actually exists rather than something that a variable tends towards. Same with the infinitesimal. Indeed when most mathematicians write the symbol for infinity into an equation they are using it to describe the different rates at which a variable tends towards infinity/-infinity. In the real world nothing will ever reach infinity. You could argue with me that "Hey! I'll just start counting," (maybe you'll even start from a really large number), "I'll surely get to it one day," you say. Then I say to whatever number you have arrived at "Okay, now add 1 to that number." Well wait a minute. "If I counted forever, though?" you suggest. Then I say, "how do you intend to do that? Will you just go on living forever?" Then, you say: "Well I'll build a computer that is tough enough to process this problem forever, and continues to create its own storage space to allow the counting." Then I will just say: "Well if we assume there is enough matter in the universe to store all that information, then my only concerns are this: What does the computer do when it has lived until the end of this universe? How will it process if this universe has reached its natural end?" Then you suggest: "Maybe the universe goes on forever!". I will smile and just say: "Okay, tell me what it's age in seconds is when this universe reaches "forever", and I will ask you to add 1 second to that number. Then, come back to me in a second and tell me if the previous forever was truly "forever".
Infinity is a concept that refers to something that has no end or limit. It is often used in mathematics and philosophy to represent a number or a concept that is larger or greater than any finite number or measure.
No, infinity cannot be measured in the traditional sense. It is a concept that represents something that is endless or limitless, and therefore cannot be quantified or measured using standard units of measurement.
Infinity is a fundamental concept in mathematics and is used in various branches of mathematics such as calculus, geometry, and number theory. It is often used to represent the concept of unboundedness and is crucial in understanding limits, sequences, and series.
Yes, there are different types of infinity in mathematics. The most commonly known are countable and uncountable infinities, which are used to represent the size of sets and the continuity of numbers, respectively.
This is a debated question in philosophy and mathematics. Some argue that infinity is a real concept that exists in the physical world, while others see it as an abstract idea that only exists in our minds and is used as a tool in mathematics.