<p>There are large quanta between the courses 55 to 25; 25 to 23; 23 to 21</p>
<p>This year in 55b Siu took his problem sets from his grad course on analysis and made them harder for the math 55 students doing the same material. </p>
<p>For 25-- have a good understanding of “proof based” work–that is a very different beast than regular math problems and the students who find themselves in trouble aren’t those for whom the material per se if difficult but rather have a difficult time writing proofs.</p>
<p>Also try if you can to become at least somewhat fluent in LaTeX.</p>
<p>Here us a guide the math department has on its web site-- they don’t endorse the guide but they do publish it-- so go figure (in a matter of speaking…haha)</p>
<p>[Harvard</a> Mathematics Department : 21, 23, 25, or 55?](<a href=“http://www.math.harvard.edu/pamphlets/freshmenguide.html]Harvard”>http://www.math.harvard.edu/pamphlets/freshmenguide.html)</p>