Example 15.8.6 (0H73)—The Stacks project

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Example 15.8.6. Let $R$ be a ring and let $I, J\subset R$ be ideals. Then $\text{Fit}_0(R/I) = I$ , $\text{Fit}_0(R/I \oplus R/J) = IJ$ , $\text{Fit}_1(R/I\oplus R/J) = I+J$ .

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