- truncation point
- trust region
- trust region method
- trustworthy
- truth
- truth criterion
- truth definition
- truth function
- truth functor
- truthlikeness
- truth matrix
- truth-predicate
- truth set
- truth symbol
- truth table
- truth-table degree
- truth-table reducibility
- truth-table reducible set
- truth-table technique
- truth valuation
- truth value
- truth-value function
- truth-value functional system
- trying
- Tschirnhausen cubic