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"generation theory" » "generation theorem", "generative theory", "iteration theory"
"operations theory" » "operators theory", "observations theory", "relations theory"
"operator theory" » "operators theory", "operation theory"
"generation theory" » "generation theorem", "generative theory", "iteration theory"
"operations theory" » "operators theory", "observations theory", "relations theory"
"operator theory" » "operators theory", "operation theory"