CS 201 - Spring 2025. 2/12/2025.

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Welcome to CS 201!

Video of the Day

Winter, Vivaldi, Four Seasons.

I hereby solicit suggestions for the video of the day. Please email me your ideas with explanations. Selected entries will win 5 homework points. If your video is played at the beginning of class, you must also briefly explain something about the video and something about yourself - in person.

Logical problem of the day

A few years ago, I was driving on Trumbull Street. The car in front of me had the license plate "1 0 1 - 0 1 0". I pulled beside the car and spoke with the driver, asking him if he knew his plate was a binary number. He said yes, he was an electrical engineer. As it turns out, his car's logo was also a binary number. What kind of car was he driving? (Hint: the brand name is a Latin translation of the founder's last name.)

https://pollev.com/slade You may also download the app to your phone. Use the "slade" poll id.

Canvas Quiz of the Day (need daily password)

Most days, there will be a simple canvas quiz related to the lecture. You need a password to activate the quiz, which I will provide in class. These quizzes will count toward your class participation grade. The quiz is available only during class.

Click for today's quiz.

Lecture 13: Computability + UNIX.

  • I have office hours Wednesdays from 4-6 pm, on zoom, id 459 434 2854.

  • I am available for lunch on Mondays at 1 pm in Morse.

  • ULA office hours are found at https://csofficehours.org/CS201/schedule. Sign up via the queue.

  • Homework assignments: [Assignments]. hw3 is now available. Note: I have listed provisional due dates for all assignments. Catch up on reading the Racket Guide, chapters 3 and 4.

    Announcements

  • If you have an upcoming performance or athletic event, I am happy to promote it during class. Just send me a note.

  • Information Society Project Yale Law School. Weekly Events

    Lecture: Computability.

    Augustin-Louis Cauchy, the famous French mathematician, once came across a number theory article proving that the astonishing Diophantine equation x3+y3+z3=t3 had no solution in the whole numbers.

    Cauchy, who beneath his stern exterior hid a rather sarcastic and even laughing nature, objected by sending the original back with a simple one-line note:

    33+43+53=63

    Computability.html (jupyter)

    Getting to know UNIX

    UNIX Introduction Principle 2.
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