- published: 14 Oct 2012
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In mathematics, the natural numbers are those used for counting (as in "there are six coins on the table") and ordering (as in "this is the third largest city in the country"). In common language, words used for counting are "cardinal numbers" and words used for ordering are "ordinal numbers".
Some authors begin the natural numbers with 0, corresponding to the non-negative integers 0, 1, 2, 3, …, whereas others start with 1, corresponding to the positive integers 1, 2, 3, …. Texts that exclude zero from the natural numbers sometimes refer to the natural numbers together with zero as the whole numbers, but in other writings, that term is used instead for the integers (including negative integers).
The natural numbers are the basis from which many other number sets may be built by extension: the integers, by including an additive inverse (-n) for each natural number n (and zero, if it is not there already, as its own additive inverse); the rational numbers, by including a multiplicative inverse (1/n) for each integer number n; the real numbers by including with the rationals the (converging) Cauchy sequences of rationals; the complex numbers, by including with the real numbers the unresolved square root of minus one; and so on. These chains of extensions make the natural numbers canonically embedded (identified) in the other number systems.
This tutorial introduces the concept of a number line and uses it to represent natural numbers, whole numbers, and integers. Need More Algebra Help? I highly recommend this book. http://amzn.to/1EApcPp Donate http://bit.ly/19AHMvX
Natural numbers are naturally Numbers you count on your hands and your feet 1, 2, 3, 4, 5, 6, and so on Whole numbers are natural numbers plus zero That's the only difference, oh, oh 0, 1, 2, 3, and so on Integers are whole numbers plus negatives They look a little bit like this -2, -1, 0, 1, and so on Last but not least, not to be outdone Rational numbers are integers plus fractions Like -3, 1/2, 5/8 and 14.2 All natural numbers are whole numbers All whole numbers are integers All integers are rational numbers Now listen to that drummer! What about 4? It's a natural number so it's also whole, integer, and rational What about -2? Integer and rational What about 1.5? It's just rational What about 0? It's whole, integer, and rational All natural numbers are wh...
What are natural numbers We learn natural numbers by taking help of counting. Look around you, you will find so many things now count those things. You will count as 1 2 3 4 5 6 7 8 9 10..... and so on. Now look at the numbers which you used while counting you used 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, ....and so on. These numbers help us while counting. And these numbers are natural numbers. So we can define natural numbers as the numbers which are used while counting are called as natural numbers. Now we take few examples 1, 34, 4678, 2100, 24045 are all natural numbers And 0, -1, -234, 4.99, 3/4 , all are not natural numbers. SSSS KK KK IIIIIIIIIIIIIIIII LL SS SS KK KK III LL SS ...
MAIN VIDEO IS AT: http://youtu.be/w-I6XTVZXww Ed Copeland and Tony Padilla are physicists at the University of Nottingham. Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com/numberphile Numberphile tweets: https://twitter.com/numberphile Google Plus: http://bit.ly/numberGplus Tumblr: http://numberphile.tumblr.com Videos by Brady Haran Brown papers: http://bit.ly/brownpapers A run-down of Brady's channels: http://bit.ly/bradychannels
Read this too: http://www.bradyharanblog.com/blog/2015/1/11/this-blog-probably-wont-help EXTRA ARTICLE BY TONY: http://bit.ly/TonyResponse The sum of all natural numbers (from 1 to infinity) produces an "astounding" result. ANOTHER PROOF & EXTRA FOOTAGE: http://youtu.be/E-d9mgo8FGk MORE: http://youtu.be/0Oazb7IWzbA NY Times article on this: http://nyti.ms/1iftqSv Tony Padilla and Ed Copeland are physicists at the University of Nottingham. They talk physics at our sixty symbols channel: http://www.youtube.com/sixtysymbols Grandi's Series: 1-1+1-1.... http://www.youtube.com/watch?v=PCu_BNNI5x4 Read more about divergent series: http://en.wikipedia.org/wiki/Divergent_series We also here that Chapter XIII of Konrad Knopp's book, "Theory and Application of Infinite Sequences and Series", is ...
This video introduces you to the basic family of numbers explaining Natural numbers, whole numbers, Integers and their classifications. It also briefs us with fundamentals of even numbers, odd numbers and their general formulae. Giving details About integers and its relation with whole and natural numbers we also learn about prime numbers, composite numbers and their characteristics. Video is in mixed Hindi & English language, meant for Indian students. Suitable for Students from any class, or anyone who is interested in learning or revising the concepts of mathematics. For more upcoming videos in the series of Numbers, and variety of other video lectures on Fundamental and Vedic Maths, Please Subscribe - https://www.youtube.com/channel/UCm9WXKJVZnaj8hCakeqLs6A
For a complete lesson on natural numbers and whole numbers, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to use the place value chart to write numbers in a variety of ways. For example, the number 89,234 can be written as the word name eighty-nine thousand, two hundred thirty-four, or in expanded notation as 8 ten thousands + 9 thousands + 2 hundreds + 3 tens + 4 units. Students also learn to find the value of a given digit in a given number. For example, the digit 5 in the number 1,508,346 means 5 hundred thousands.
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•••••• MIRROR: https://vimeo.com/9953368 •••••• A movie inspired on numbers, geometry and nature, by Cristóbal Vila · Go to www.etereaestudios.com for more info about movie · Music by Wim Mertens - "Often a bird" from the album "Jardin Clos", 1996 - © Usura - Published by Usura 2010
Please feel free to leave comments/questions on the video and practice problems below! In this video, I discuss the von Neumann construction of the natural numbers and relate the idea of natural numbers to inductive sets. The axiom of infinity is also introduced here as one of the ZFC axioms.
This is a sobering and perhaps disorienting introduction to the fact that arithmetic with bigger numbers starts to look quite different from the familiar arithmetic that we do with the small numbers we are used to. The notion of complexity is key in our treatment of this. We talk about both exponential and triangular complexity. Complexity rests on our ability to be able to utilize powers. So this video also gives a rather novel overview of a lot of powers that are usually somewhat beyond our view. It is, I believe, instructive to roll up one's sleaves occasionally and descend to specific examination of the arithmetic of our mathematics. The disruptive aspect of this topic arises when we inquire into the large-scale behaviour of this complexity. Note: Mike Dupont reports that Wolfram ...
Here we look at a somewhat unfamiliar aspect of arithmetic with natural numbers, motivated by operations with multisets, and ultimately forming a main ingredient for that theory. We look at natural numbers, together with 0, under three operations: addition, union and intersection. We will somewhat informally at this point refer to this as the `realm' of natural numbers. In this video we lay out some of the rather obvious properties that these three operations satisfy. There are some surprises here: in particular we see an unusual new kind of distributive law which will become the basis for the `tropical calculus'.
It is time to turn our gaze back to the true foundations of the subject: arithmetic with natural numbers. But now we know that the issue of "What exactly is a natural number?" is fraught with subtlety. We adopt a famous dictum of Errett Bishop, and start to make meaningful distinctions between primitive natural numbers, Hindu Arabic numerals, and arithmetical expressions. We will see that we need to have a much more careful look at both natural numbers and a lot of modern number theory. In particular we touch base with a disconcerting reality: that there are not an "infinite number of prime numbers". And we give a perhaps novel definition: we actually define clearly and unambiguously what a (primitive) natural number actually is. Not surprisingly, our experience and facility with data ...
We show how we can construct the natural numbers starting with five fundamental properties (axioms) that lead to the familiar counting numbers. This is an exercise of piecing together something very familiar by analyzing an a largely unfamiliar set of implicit assumptions.
We define the algebra of addition on the naturals by way of the axioms and prove the standard associative and commutative properties of addition. We know this from childhood. What’s valuable about this approach is that we see more clearly what our algebra is by examining it among all possible algebras on the naturals.
Primitive natural numbers and Hindu Arabic numerals can be pinned down very concretely and precisely. But what about numbers expressed via more elaborate arithmetical expressions, perhaps involving towers of exponents, or hyperoperations? Is there a consistent and logical proper way of setting up arithmetic with such things? The answer is much less satisfactory than we might like. All kinds of subtle, and not so subtle, difficulties arise. Almost all the familiar kinds of simple arithmetic operations and questions quickly become intractible with these kinds of numbers. Or ought we to say: with these kinds of "numbers"?
To get a more firm foundation for the real numbers, we construct them, starting with the natural numbers and working our way up.