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We study single machine scheduling problems, where processing times of the jobs are exponential functions of their start times. For increasing functions, we prove strong NP-hardness of the makespan minimization problem with arbitrary job release times. For decreasing functions, maximum lateness minimization problem is proved to be strongly NP-hard and total weighted completion time minimization problem is proved to be ordinary NP-hard. Heuristic algorithms are presented and computationally tested for these problems.

Job Sequencing with Exponential Functions of Processing Times