Corrections, retractions, clarifications, apologies and other notices of factual errors published in major Canadian daily newspapers, from Regret the Error: How Media Mistakes Pollute the Press and Imperil Free Speech, published by Viking Canada in 2007.

Any number divided by zero is undefined, not zero as reported last Sunday in a Starship article about the number zero. Zero divided by zero is also undefined. The Star regrets the ­error. —Toronto Star

A Report on Business item on Wednesday misstated two facts relating to Scott Paterson, the former head of Yorkton Securities. Mr. Paterson remains married to his second wife. Additionally, he was described by Peter C. Newman in his most recent book as precocious, not ­precious. —Globe and Mail

The Ottawa Citizen and Southam News wish to apologize for our apology to Mark Steyn, published Oct. 22. In correcting the incorrect statements about Mr. Steyn published Oct. 15, we incorrectly published the incorrect correction. We accept and regret that our original regrets were unacceptable and we apologize to Mr. Steyn for any distress caused by our previous apology. —Ottawa Citizen

A Canadian Press story published Tuesday made a reference to “rig pigs” as if the term were an acceptable one in the oil industry for drilling rig workers. In fact, the term is considered derogatory and outdated. —Canadian Press

Contrary to a story in today’s What’s On, Singer Lena Horne is not dead. The Star regrets the error. —Toronto Star

The television actor John Aniston is still alive. Incorrect information appeared in Shelley Fralic’s column on this page Saturday. —Ottawa Citizen

Heather Crowe, the former Ottawa waitress who became an activist against second-hand smoke after being diagnosed with lung cancer, is alive. Incorrect information appeared in yesterday’s National Post. —National Post

Wednesday’s story about Canada’s Walk of Fame inductees incorrectly referred to “the late Morley Safer.” Safer is alive and continues to file stories as a 60 Minutes correspondent. The Star regrets the error. —Toronto Star

Hash brownies were not consumed on The Dawn and Drew Show. Incorrect information appeared yesterday. —Globe and Mail