
What is not an injective?
I'm trying to understand the concept of injectivity in mathematics, specifically in the context of functions. I know that an injective function is one that maps distinct elements of its domain to distinct elements of its codomain. Now, I'm interested in exploring what it means when a function is not injective.


What does catex mean?
The user wants to know the meaning of the term 'catex'. They are seeking a clear and concise explanation of what 'catex' stands for or represents.


What is free commerce?
I'm wondering about the concept of free commerce. Could someone explain what it means and possibly provide some context or examples to help me better understand this term?


What is the use of supersede?
I'm trying to understand the purpose or function of the word 'supersede'. I want to know how it is typically used in language and what it means when someone says 'supersede'.


What is the PTA agreement?
I'm trying to understand the PTA agreement. Could you explain what it is and provide some background information about it?
