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 Jan 30 revised How do you go about solving this recurrence? added 52 characters in body May 29 revised How find the number of $z$,such that$|a^2-b^2-b+1|\le 10$ added 365 characters in body May 24 revised Grover Algorithm Orthogonal vectors added 15 characters in body Jun 26 revised Validity of $\sum_{i=1}^n(a_i^2+b_i^2+c_i^2+d_i^2)\lambda_i\geq\lambda_1+\lambda_2+\lambda_3+\lambda_4$? added 99 characters in body; added 570 characters in body; added 2 characters in body Jun 26 revised Puzzle: $(\Box @)+(\Box @) = (\Box\bigstar\Box$) added 123 characters in body Jun 26 revised Validity of $\sum_{i=1}^n(a_i^2+b_i^2+c_i^2+d_i^2)\lambda_i\geq\lambda_1+\lambda_2+\lambda_3+\lambda_4$? added 454 characters in body; added 39 characters in body; added 55 characters in body; added 47 characters in body Jun 25 revised Plane intersecting line segment added 66 characters in body Jun 25 revised Plane intersecting line segment added 32 characters in body Jun 14 revised Smooth transition between two lines (2d) added 188 characters in body Jun 14 revised Smooth transition between two lines (2d) added 81 characters in body Jun 14 revised How to get the cardinal direction from one location to another? deleted 105 characters in body; added 243 characters in body Jun 14 revised How to get the cardinal direction from one location to another? added 46 characters in body Jun 14 revised How to get the cardinal direction from one location to another? added 23 characters in body; added 124 characters in body; added 155 characters in body Jun 14 revised What is Riemann-Roch in arithmetic all about? rencently fixed Jun 14 revised Compute $\lim\limits_{n \to \infty }\sin \sin \dots\sin n$ added 621 characters in body; deleted 2 characters in body Jun 14 revised Compute $\lim\limits_{n \to \infty }\sin \sin \dots\sin n$ added 79 characters in body; added 1 characters in body; added 92 characters in body; added 3 characters in body Jun 14 revised Compute $\lim\limits_{n \to \infty }\sin \sin \dots\sin n$ added 128 characters in body; added 52 characters in body; deleted 40 characters in body Jun 14 revised Algebraic proof of a trig matrix identity? added 7 characters in body; added 1 characters in body Jun 11 revised Is there an analogue to the “Delta” symbol for ratios? added 176 characters in body Jun 11 revised Question about Holomorphic functions added 159 characters in body; added 780 characters in body