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January 21st, 2017, 06:56 PM  #1 
Newbie Joined: Jan 2017 From: California Posts: 1 Thanks: 0  New blog: Infinity Plus One
So, I've started a new blog, Infinity Plus One, discussing more advanced math topics, but aimed at a lay audience. I thought this forum looked like a place where people interested in this kind of resource (or who know those who would be) congregate. So, here are links for my first two posts. I hope you enjoy them. First post: Infinity plus one Second post: The size of infinity 
January 21st, 2017, 08:35 PM  #2  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,765 Thanks: 707 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
Dan  
January 21st, 2017, 08:56 PM  #3 
Senior Member Joined: Sep 2016 From: USA Posts: 357 Thanks: 195 Math Focus: Dynamical systems, analytic function theory, numerics  I think we tell calculus students this because they aren't yet equipped with methods to handle the number infinity. However, I disagree that infinity is not a number in any way. There are multiple contexts in which infinity is a perfectly good number and a blog discussing advanced math topics is likely to cover these.

January 21st, 2017, 10:17 PM  #4  
Math Team Joined: May 2013 From: The Astral plane Posts: 1,765 Thanks: 707 Math Focus: Wibbly wobbly timeywimey stuff.  Quote:
I did make a slight mistake, however. I forget the name of the system but it is the real numbers with infinity attached, rather like the closure of the real line. I think it's called the extended real line or something of that nature. Dan  
January 21st, 2017, 10:22 PM  #5 
Math Team Joined: Dec 2013 From: Colombia Posts: 7,274 Thanks: 2435 Math Focus: Mainly analysis and algebra 
The extended real line doesn't include a number "infinity". It's more like a set of names for limit points.


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