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Difference between curly derivatives and ordinary d derivatives, when to use each?

by roberto85
Tags: curly, derivatives, difference, ordinary
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roberto85
#1
Nov4-09, 06:06 PM
P: 38
1. The problem statement, all variables and given/known data
The title says it all, what is the difference between the curly d used for derivatives and a normal d in derivatives. When do you know when to use each one? Thanks
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Sorry!
#2
Nov4-09, 06:16 PM
P: 571
Quote Quote by roberto85 View Post
1. The problem statement, all variables and given/known data
The title says it all, what is the difference between the curly d used for derivatives and a normal d in derivatives. When do you know when to use each one? Thanks
Curly d is used for partial derivatives. Regular d is for a total derivative.

Partial derivatives are when treat one variable as a variable and keep the rest as constants ignoring the relationship between the variables.

Total derivatives are when you do the same as above but the relationship between variables remains.
roberto85
#3
Nov4-09, 06:30 PM
P: 38
Quote Quote by Sorry! View Post
Curly d is used for partial derivatives. Regular d is for a total derivative.

Partial derivatives are when treat one variable as a variable and keep the rest as constants ignoring the relationship between the variables.

Total derivatives are when you do the same as above but the relationship between variables remains.
Thanks, i did remember the curly d being used alot in partial deriv's, but wasnt sure that was their sole use. Thanks for clearing it up


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