Borders Memes

The ultimate mathematical dad joke has crossed the border! This meme brilliantly combines calculus with international relations. When mathematicians write "lim" with the USA flag approaching the Canada flag, they're showing the mathematical limit of USA as it approaches Canada - which is literally the border crossing! The "NO RE-ENTRY TO USA" sign is the punchline that makes calculus students snort coffee through their noses. It's like the function is continuous until you hit that border, then BOOM - discontinuity! Your calculus professor would be simultaneously proud and disappointed in you for laughing at this.