Chuck or Charles?

<p>Hi, i am not an english speaker. one of my recommenders is an american professor who teaches at my school this semester. he agreed to be my recommender. However, I found something very strange when he gave me the sealed and signed letter–he signed Charles instead Chuck. He told us his name is Chuck XXX in the first class and it is also Chuck on his name card. and i used Chuck for all those forms and now he signed Charles on the letter. telling me that they are the same!!!So i want to ask you guys, the native speakers: will this bring some trouble to my application???i am so worried.
Thank you!</p>

<p>chuck is a nickname for charles. As long as the last name matches up im sure it wont be an issue.</p>

<p>Chuck is a common nickname for Charles, similar to Bob (Robert) and Mike (Michael). Don’t worry about this, no one will care.</p>

<p>Ya, don’t worry about it… there are plenty of english transitions that don’t seem to make a lot of sense sometimes.</p>

<p>Let T:N->N where N is the space of english names</p>

<p>T(William)=Bill
T(James)=Jim
T(Richard)=Dick</p>

<p>T is generally one to one but certainly not onto.</p>

<p>go figure.</p>

<p>thank you all very much for your explanation! now i think i can relax:)</p>