Properties of differential operators

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Homework Help Overview

The discussion revolves around the properties of differential operators in the context of solving a system of differential equations. The original poster presents an equation involving a differential operator, specifically questioning the validity of dividing out the operator.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • The original poster attempts to simplify the equation by dividing out the differential operator (D+2) and questions whether this leads to a valid conclusion. Some participants respond by indicating that the operator is not invertible, suggesting that this approach may not be mathematically sound.

Discussion Status

The discussion is ongoing, with participants providing clarifications regarding the properties of the differential operator and its implications for the original poster's approach. There is an acknowledgment of the misunderstanding, but no consensus has been reached on a revised method.

Contextual Notes

Participants note that there are functions satisfying the equation (D+2)Z=0 that are not equal to zero, which influences the validity of the original poster's proposed simplification.

mathnoobie
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Homework Statement


Hi, I am solving a system of differential equations and in one of my equations I have this,
(D+2)X+(D+2)Y=0 where X and Y are variables, D is my differential operator.
My question is, would it be mathematically correct to divide out (D+2)
and thus getting X+Y=0, X=-Y ?
 
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mathnoobie said:

Homework Statement


Hi, I am solving a system of differential equations and in one of my equations I have this,
(D+2)X+(D+2)Y=0 where X and Y are variables, D is my differential operator.
My question is, would it be mathematically correct to divide out (D+2)
and thus getting X+Y=0, X=-Y ?

No, it wouldn't.
 
mathnoobie said:

Homework Statement


Hi, I am solving a system of differential equations and in one of my equations I have this,
(D+2)X+(D+2)Y=0 where X and Y are variables, D is my differential operator.
My question is, would it be mathematically correct to divide out (D+2)
and thus getting X+Y=0, X=-Y ?

No, (D+2) isn't an invertible operator. There are functions that satisfy (D+2)Z=0 where Z isn't 0. Try to take that into account and try again.
 
Ah alright, thank you. That explains why my answer seemed to make no sense.
 

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