upgrade structures and migrate to nextra v4

content/Math4121/index.md

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+# Math4121
+
+Riemann integration; measurable functions; Measures; the Lebesgue integral; integrable functions; $L^p$ spaces.
+
+## Textbook
+
+Principles of Mathematical Analysis by Walter Rudin
+
+A radical Approach to Lebesgue's Theory of Integration by David
+
+## Grade
+
+| item | percentage |
+| --- | --- |
+| Homework | 40% |
+| Midterm 1 | 15% |
+| Midterm 2 | 15% |
+| Final | 30% |
+
+## Homework
+
+Due every Monday.
+
+## Office Hour
+
+Monday 1pm-2pm
+
+Wednesday 12pm-1pm
+
+Friday 11:30am-12:30pm