Changes in version 0.2.6 (2025-11-30) - New two-argument function ifthen() for material implication. - Updated documentation about choice of logical notation, emphasizing possible non-standard connective precedence. - inferP() issues a warning if ! is used for "not" together with * + >, owing to very error-prone connective precedence with this use combination. Changes in version 0.2.5 (2025-10-06) - Corrected links in documentation. - New examples with inequality constraints. - Initial CRAN submission. Changes in version 0.2.0 - New default notation, closer to the mathematical one. - New argument solidus = to select new (default) or old notation. Changes in version 0.1.0 - Release of main function and explanatory vignette.