Jansson, ChristianChristianJansson2021-05-052021-05-051998-11Reliable Computing 10 (3): 345-350 (1998)http://hdl.handle.net/11420/9434The purpose of this paper is to show that solving a simple looking nonlinear system is NP-hard, although it has many attractive features from the point of view of numerical and interval analysis.en1573-134019983345350KluwerMathematikJournal Article10.1023/a:1024463631728Other