Tuesday’s brief, “N.Y. state official gives Columbia grad organizers’ poll certification,” incorrectly stated the number of teaching and research assistants polled and the data collection process. A majority of 2,021 Columbia teaching and research assistants indicated on union authorization cards that they support forming a union.

The brief incorrectly identified Henry Pinkham. Pinkham is the dean of Columbia’s Graduate School of Arts and Sciences.

Yesterday’s article “Tasti D-Lite to open doors on High St.” incorrectly identified the nature of Tasti D-lite products. Tasti D-Lite frozen desserts contain no yogurt.