I am playing “Sonate Pathetique,” whose time signature is 4/4. I came across a bar with four notes that looked like half notes. I asked my friend, and he said it meant “the same as the previous four notes.” What is the name of this note?
Additionally, I now came across a bar with three of these notes and one quarter note. What do I do now?
Edit: Here's a photo of the part I'm stuck on:
Right, I know I must be causing everyone a massive headache right now (sorry...) Looking back, the photo I sent is definitely not what I encountered before. What I saw before was, indeed, a tremolo, and what I show here is just a very simple 3 half notes with a quarter note. I don't know why I also thought that was a tremolo. Sorry for the confusion.