You can change your username as follows:
- Log in to Numerical Acumen.
- Go to your My Stuff page.
- From there, go to your Profile page.
- Click on Change username.
You will be prompted to type your new username.
Your username must be between 4 and 20 characters, and must not contain spaces.
If your newly chosen username is already being used by someone else, you will be prompted to try another one.
For security reasons, you will also be prompted to enter your password.