Questão jurídica principal
Whether the cantonal maintenance calculation was arbitrary under Art. 9 BV because of a mathematical error affecting the amount of spousal support.
Decisão extraída
Yes. The Obergericht clearly intended a precise needs-and-half-surplus calculation, so the arithmetic mistake that lowered the maintenance amounts constituted arbitrariness.
Fundamentação extraída
A calculation error affecting the result is arbitrary when the court used a strict mathematical method rather than broad equity. The amount was demonstrably lower than the correctly computed maintenance, and even a relatively small monthly difference is legally relevant.