Just in case the symbols do not appear correctly they are d, upper case delta, lower case delta, and lower case del.(adsbygoogle = window.adsbygoogle || []).push({});

Also, what is the difference between dy, Δy, δy and ∂y when they are on their own?

I think δy (lower case delta) is a infinitesimally small change in y, where as Δy (uppercase delta) is just y2 - y1 where the difference can be much larger.

Is this correct?

Also how does this differ from dy and ∂y?

Note:

I understand calculus and rates of change, I just do not know the difference between these different symbols and forms of differentials.

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# What is the difference between dy/dx, Δy/Δx, δy/δx and ∂y/∂x?

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