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The column headings from left to right are as follows: reference, differential form, and integral form. The equations are as follows:

- Reference, Gauss’s law. Differential form, nabla dot upper D equals rho sub v. Integral form, the closed surface integral of upper D dot lower d s equals Q. Equation 6.1.

- Reference, Faraday’s law. Differential form, nabla cross E equals negative the partial derivative of B with respect to t. Integral form, the close integral of E dot d I equals negative the surface integral of the partial derivative of B with respect to t dot lower d s. Equation 6.2 star.

- Reference, no magnetic charges (Gauss’s law for magnetism). Differential form, nabla dot B equals 0. Integral form, the closed surface integral of B dot lower d s equals 0. Equation 6.3.

- Reference, Ampere’s law. Differential form, nabla cross H equals j plus the partial derivative of d with respect to t. Integral form, the closed surface integral of H dot d I equals the surface integral of left parenthesis j plus the partial of d with respect to t right parenthesis dot d s. Equation 6.4.