
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
November 20th, 2018, 12:21 AM  #1 
Member Joined: Nov 2012 Posts: 66 Thanks: 1  Composition of relations
For function, a composition can be defined if the range of the first function is a subset of the domain of the second function. For a general relation, a binary composition can be defined if there is a “bridging” set in between two relations eg. R1:X>Y and R2:Y>Z then the composition of R2 with R1 is donoted by R2。R1:X>Z My question is can the set Y in both relations be different, say R1 is from {1,2,3} to {a,b,c} while R2 is from {a,b,c,d,e} to {1,2,3,4,5}. Does R2。R1 exist for this case? 

Tags 
composition, relations 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
function composition  fromage  Real Analysis  0  January 6th, 2015 04:06 AM 
Function composition  johnny  Calculus  2  March 27th, 2011 04:53 AM 
binary composition  poojabi  Abstract Algebra  1  November 25th, 2010 02:54 PM 
Composition of a function f.  ZardoZ  Calculus  3  November 17th, 2010 06:44 AM 
Composition  Nusc  Real Analysis  1  June 24th, 2010 09:39 AM 