HP Thread VA000 - HP-41-42 style RPN challengeDuring the time I was active in the old Museum of HP Calculators (very active since May 9th, 2001) I posted some 1,897 posts and created 136 threads over the years, and since I've signed up to the new version I've posted several hundred more. As searching for a particular post in the old forum can be quite time-consuming (and even a hit-or-miss affair if you're not quite sure about the exact description of what you're trying to find), I've included here a selection of the 150 Best threads either directly created by me or featuring some of my best posts, carefully chosen one by one to include most of my allegedly very best posts, mainly the ones where I discuss programming techniques, math algorithms and topics, or give useful routines and program snippets to illustrate or solve some problem or other peoples' challenges.
The selection features also some threads which do not include any posts from me but where some of my posts or articles are extensively discussed by others, or include substantial discussions about me or my circumstances. Also, though the threads in the selection are usually included in full in the PDF, a number of them are trimmed to include only the parts relevant to me or my posts or which are necessary for comprehension. The reason is that many, many threads usually stay focused for a while but then digress enormously, with hundreds of subsequent posts having nothing to do with the original subject at all. I see no need to include such threads in all their length and so I trim them to just the relevant parts, which makes for much less space used and much more convenience afforded. In any case, the full-length thread can be consulted if desired without further search, as I give every thread's original URL in their own PDF.
Last but not least, these threads also do not include the ones I created to post my Challenges of all kinds, which you can find in the HP Calculator Challenges Category in this site. I might add to the selected threads in the future, so keep your eyes peeled !
HP Thread VA000 - HP-41-42 style RPN challenge
HP Thread VA001 - hp 71b
HP Thread VA002 - HP71 ROM module functions A
HP Thread VA002b - 11c Voyager
HP Thread VA002c - I email HP about need a 41CX
HP Thread VA002d - HP-71B
HP Thread VA002e - RPN RPL - What
HP Thread VA003 - HP-65 helped discover Feigenbaum number
HP Thread VA004 - Tradeoff dynamic allocation vs More Memory
HP Thread VA005 - Trigonometrics in financial applications
HP Thread VA006 - Speed
HP Thread VA007 - General Voyager display question
HP Thread VA008 - My First eBay burn
HP Thread VA009 - Quiz Evaluating polynomials
HP Thread VA011 - New HP Calculators
HP Thread VA013 - 12c Platinum Perpetuity challenge
HP Thread VA015 - Eigenvalues on 42S
HP Thread VA016 - HP-11C Solutions Handbook Errata
HP Thread VA018 - Improvement on HP-45
HP Thread VA020 - Favorite Calculator
HP Thread VA022 - No RPN calcs anymore
HP Thread VA024 - Mach number RPN vs Algebraic
HP Thread VA025 - RPN vs AOS GOOD examples
HP Thread VA026 - HP-71 Math Pac Manual (Spanish).jpg)
HP Thread VA027 - Reverse Engineering HP Solve
HP Thread VA028 - HP-41CX to PC connection
HP Thread VA029 - HP 32S vs HP32SII
HP Thread VA030 - Sorting on a 12C
HP Thread VA031 - 15c or 32s which is better
HP Thread VA032 - 49gplus first impressions
HP Thread VA033 - Re Therapy Please repeat after me
HP Thread VA034 - Humor - Eavesdropping at KinHPo
HP Thread VA035 - Your Favourite Calculator
HP Thread VA036 - What is your OWN favorite RPN program
HP Thread VA037 - Scanning advice needed
HP Thread VA038 - Hyperbolics with the Advantage
HP Thread VA039 - RPL challenge area between 2 curves
HP Thread VA040 - Douglas Adams and Hitchhikers Guide to the Galaxy
HP Thread VA041 - HP 33s - Dead or Alive
HP Thread VA042 - Programming astronomical data
HP Thread VA043 - Geometric progression
HP Thread VA044 - A simple question on trading
HP Thread VA045 - Solution times for matrix problems
HP Thread VA046 - Exp A where A is a Matrix
HP Thread VA047 - More Matrix Results HP and TI Machines
HP Thread VA048 - Math Challenge #8 - HP-16C Version
HP Thread VA049 - The pace of progress Exact factorials and the past
HP Thread VA050 - S&SMC#9 - Question to Valentin
HP Thread VA060 - S&SMC#9 Act II
HP Thread VA070 - S&SMC#9 Optimized 42S 41C RPN solution
HP Thread VA080 - Even More Results with Matrices
HP Thread VA090 - S&SMC#10 Final Notice
HP Thread VA092 - Analyzing Albillo Matrix Number 3 with the CC-40
HP Thread VA093 - Radix-100 Information (Albillo matrices).jpg)
HP Thread VA100 - More information on the Albillo Matrices
HP Thread VA100b - How many stack levels
HP Thread VA101 - New Trig Functions Program for New 12C Platinum
HP Thread VA102 - Ill conditioning and calculator precision
HP Thread VA103 - More on ill conditioning and calculator precision
HP Thread VA103b - RPN or RPL
HP Thread VA103c - Sample problems to evaluate RPL vs RPN objectively
HP Thread VA104 - Even More Simultaneous Equation Solutions
HP Thread VA105 - RREF on the HP-49 Revisited
HP Thread VA110 - HP-15C Quicker identity-matrix program
HP Thread VA115 - How does ill-conditioning happen
HP Thread VA120 - Numerical integration on the 11C
HP Thread VA140 - Random simulation (and stimulation)
HP Thread VA150 - 7 Out Of 10
HP Thread VA160 - A modest arithmetical challenge
HP Thread VA170 - Non-extended BASIC programs for matrix work
HP Thread VA180 - For the best of you in geometry
HP Thread VA185 - Letter to the Editor of Datafile
HP Thread VA187 - HPCC club and Valentin Albillo
HP Thread VA190 - Are Matrices Relevant
HP Thread VA195 - Testing Matrix Multi-Tool Program for HP-35s
HP Thread VA200 - Solving a linear system with physical meaning
HP Thread VA209 - Rank-deficient matrices
HP Thread VA210 - BASIC to RPL translation
HP Thread VA220 - 35s Programming need help
HP Thread VA230 - Lambert W on the HP-33s
HP Thread VA240 - HP67-97 RND Function
HP Thread VA250 - The 7x7 Linear Equation Solver for the HP-67
HP Thread VA260 - Is there any interest in HP-150 source code
HP Thread VA268 - Gamma and Factorial for 12C 12CP
HP Thread VA270 - 4915 digits of pi MCODE 41 19660 digits opt
HP Thread VA280 - Wolfram Alpha now LIVE
HP Thread VA290 - Math question
HP Thread VA300 - 41C 30th Birthday Game
HP Thread VA310 - Challenge Keith numbers
HP Thread VA313 - Lambert W (HP-12Cp).jpg)
HP Thread VA315 - HP-71 matrix methods (LU decomp).jpg)
HP Thread VA320 - Numerical Integration HP TI etc
HP Thread VA325 - Determinants of the AM1 matrix
HP Thread VA330 - Matrix functions on the WP 34s
HP Thread VA340 - Impressive TI NSpire CX CAS Multiple Integration
HP Thread VA350 - Sunday Programming Challenge
HP Thread VA360 - New variant Romberg Integration (sinc)
HP Thread VA370 - HP71B Maths Module
HP Thread VA380 - Another tough integral
HP Thread VA390 - Question for Valentin Identifying Constants
HP Thread VA400 - Programming challenge Euler Totient function
HP Thread VA410 - WP 34S accuracy is excellent
HP Thread VA420 - How to EMU71 on an Android Tablet
HP Thread VA430 - Programming exercise
HP Thread VA440 - Riemann Zeta Function
HP Thread VA450 - Estimating accuracy in finite precision
HP Thread VA600 - Can you calculate Pi using a Solver
HP Thread VA605 - Estimation quiz
HP Thread VA610 - Clever fast Mandelbrot - please explain
HP Thread VA615 - What is the hardest (longest-running) financial calculation%20financial%20calculation.jpg)
HP Thread VA620 - Gerson Pi Program
HP Thread VA625 - An iteration produces all the prime numbers
HP Thread VA630 - Valentín website update thread Comments and appreciation
HP Thread VA635 - Comments and discussion on Valentin 4th Then and Now - Area
HP Thread VA640 - Comments and discussion on Valentin 5th Then and Now - Roots
HP Thread VA645 - Reflections on Valentin 2023 Pi day special
HP Thread VA650 - Division vs DIV - Valentin findings
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