anorton

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bio website RoboDesigners.com location Virginia, USA age 19 member for 2 years, 11 months seen 3 hours ago profile views 1,690

Programmer, robotics enthusiast, and math-lover. Future computer scientist or mathematician.

Check out my blog at robodesigners.blogspot.com.

 30 Prove that 1 + 4 + 7 + · · · + 3n − 2 = n(3n − 1)/ 2 26 Interview riddle 26 Why does one counterexample disprove a conjecture? 20 Is there any “superlogarithm” or something to solve $x^x$? 20 Finding circumference without using $\pi$

11,548 Reputation

 +10 if $m, n \in \mathbb{N}$, $m < n$, then $S_m$ isomorphic to subgroup of $S_n$ -2 Prove that 1 + 4 + 7 + · · · + 3n − 2 = n(3n − 1)/ 2 +15 Solve the recurrence relation: $2a_n = 7a_{n-1} - 3a_{n-2}; a_0 = a_1 = 1$ +15 Notation question: $\ll$

18 Questions

 18 Notation: Why write the differential first? 14 Question from Putnam '89: Primes of the form $101\ldots01$ 14 Functions for which $\int f(g(x))\, \mathrm dx = f\left(\int g(x) \, dx\right)$ 13 Notation Question: What does $\vdash$ mean in logic? 9 Relationship between $\int_a^b f(x)\,dx$ and $\int_a^bxf(x)\,dx$

160 Tags

 171 calculus × 106 51 linear-algebra × 25 80 algebra-precalculus × 47 48 soft-question × 12 66 integration × 35 41 number-theory × 9 66 discrete-mathematics × 34 40 derivatives × 24 65 functions × 22 38 elementary-number-theory × 20

43 Accounts

 Mathematics 11,548 rep 31973 Stack Overflow 1,053 rep 520 Electrical Engineering 646 rep 223 Puzzling 451 rep 15 Science Fiction & Fantasy 404 rep 28