
Math General Math Forum  For general math related discussion and news 
 LinkBack  Thread Tools  Display Modes 
July 9th, 2014, 10:49 AM  #11  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Quote:
I use $\mathbb{Z}^+$ for the positive integers and $\mathbb{N}$ for the nonnegative integers but this is not universal  some write $\mathbb{N}$ for the positive integers instead. I've never seen a research paper using $\mathbb{W}$ in this manner. Last edited by CRGreathouse; July 9th, 2014 at 10:51 AM.  
July 9th, 2014, 10:51 AM  #12  
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  Quote:
Sometimes engineers will use an implicit base 10 but I would strongly recommend against this.  
July 9th, 2014, 01:16 PM  #13 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry 
Not even Malaysia, Timor Leste, or Suriname? OK, thanks for the informations. In my country, if it's written as log3, the base number is considered as 10, while if the base number is e, it's written as ln3 (ln stands for "logaritma natural", which literally means "element logarithm"). 
July 9th, 2014, 04:08 PM  #14 
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  I couldn't say. You can write ln in English too. Most mathematicians don't but calculators often have an "ln" button. 
July 9th, 2014, 05:04 PM  #15 
Member Joined: Jun 2011 From: California Posts: 82 Thanks: 3 Math Focus: Topology 
Monox Yeah, here in the US, when we write $\displaystyle \log\, x$, the base is automatically taken to be 10. When we write $\displaystyle \ln\, x$, the base is $\displaystyle e$. As for $\displaystyle \mathbb{H}$ being used for the irrational numbers and $\displaystyle \mathbb{W}$ being used for the whole numbers, the only place I've seen these used is in a college textbook I use for teaching intermediate algebra: Intermediate Algebra, 5th Edition by Tussy and Gustafson. 
July 9th, 2014, 05:05 PM  #16 
Member Joined: Jun 2011 From: California Posts: 82 Thanks: 3 Math Focus: Topology 
Yeah, it's interesting if I remember, some books include 0 in the naturals, while others start them at 1. Does this have any major impact that you've seen?

July 9th, 2014, 05:25 PM  #17  
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry  Quote:
Looks like you and CRGreathouse are also from different countries. Which country are you from, CRGreathouse?  
July 9th, 2014, 05:32 PM  #18 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry  The system here starts natural numbers at 1. However, there is some interesting note regarding the word "natural" here. "Natural numbers" here is called as "bilangan asli" which literally means "true numbers", though we still call "real numbers" as "bilangan real". While the literal translation of "natural numbers" in my language is "bilangan alam". However, the term "bilangan alam" in my language itself refers to "elementary numbers" e instead. This has made my very first post in this post very embarrassing because at the time I bumped a thread which said that "natural numbers" are 1, 2, 3, and so on only for me to say "Isn't natural number e?" in which one of the mods replied me with sarcasm "Best. Bump. Ever." and said that "natural numbers" were indeed 1, 2, 3, and so on. I was a smartass back then.

July 9th, 2014, 09:03 PM  #19 
Global Moderator Joined: Nov 2006 From: UTC 5 Posts: 16,046 Thanks: 938 Math Focus: Number theory, computational mathematics, combinatorics, FOM, symbolic logic, TCS, algorithms  
July 10th, 2014, 03:03 AM  #20 
Senior Member Joined: Nov 2010 From: Indonesia Posts: 2,001 Thanks: 132 Math Focus: Trigonometry 
Makes me wonder why they don't just write log2 and ln2 instead.


Tags 
difference, mathematics, notation, system 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
big O notation  gelatine1  Computer Science  13  July 16th, 2013 03:25 PM 
Notation  Chimoo  New Users  2  January 9th, 2011 11:28 AM 
What is the difference between a function and Linear System?  Dory  Algebra  1  September 15th, 2010 01:17 PM 
Difference between Metric System & International System?  zain  Elementary Math  1  April 7th, 2008 02:23 PM 
Difference in the subject of Mathematics  johnny  Algebra  1  March 7th, 2008 05:49 PM 