| 21. | V at constant S . The second derivative of E w . r . t.
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| 22. | If the ( usual ) second derivative exists, then the second symmetric derivative equals it.
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| 23. | The magnetic susceptibility, the second derivative of the free energy with the field, changes discontinuously.
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| 24. | The equation you gave is just the second derivative:
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| 25. | The diagram shows the second derivative of the black curve in the diagram above it.
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| 26. | This could be verified by examining the second derivative \ nabla _ { ww }.
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| 27. | In the theory of " H " 1, but it may not have second derivatives.
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| 28. | The frequencies are related to the eigenvalues of the Hessian matrix, which contains second derivatives.
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| 29. | And you have that a is the second derivative of x with respect to time.
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| 30. | The second derivative must be expressed as a derivative with respect to x instead of t:
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