Hi -- I have used this valuable platform many times to ask technical questions, but I am facing a particularly annoying problem in Maple 24 that did not exist in Maple 23. When I work on a Maple sheet and press Shift + Enter to move the cursor to a new line, an unwanted space appears. The issue is that when I use this combination twice on existing Maple sheets to create whitespace, the variable name often gets split up. Additionally, when I try to move back to the previous line to add something, I simply cannot. This issue did not exist in Maple 23 or any version since Maple 15. I have checked Tools > Options under both Display and Interface, but I have not found a solution. Is there a way to eliminate this annoying space?

  I would like to print my help pages to pdf. Is there a way to install A3 paper size. That would help in maintaining the layout as seen on the screen. 

Maybe there is an alternative approach.

I have a PDE of the form

u_{tt}+2*a(t)*u_x^2+2*b(t)*u(t,x,y)*u_{xx}+u_{yy}=0

How can I find Lie symmetries of this equation using PDEtools?

Please help me out.

Please write the code for 2nd Order Gausian Smoothing of the curve with the following data:

X := Vector[row](781, [0, 0.000115771, 0.000231541, 0.000347312, 0.000463082, 0.000578853, 0.000694623, 0.000810394, 0.000926164, 0.001041935, 0.001157705, 0.001273476, 0.001389246, 0.001505017, 0.001620787, 0.001736558, 0.001852328, 0.001968099, 0.002083869, 0.00219964, 0.00231541, 0.002431181, 0.002546952, 0.002662722, 0.002778493, 0.002894263, 0.003010034, 0.003125804, 0.003241575, 0.003357345, 0.003473116, 0.003588886, 0.003704657, 0.003820427, 0.003936198, 0.004051968, 0.004167739, 0.004283509, 0.00439928, 0.00451505, 0.004630821, 0.004746591, 0.004862362, 0.004978132, 0.005093903, 0.005209674, 0.005325444, 0.005441215, 0.005556985, 0.005672756, 0.005788526, 0.005904297, 0.006020067, 0.006135838, 0.006251608, 0.006367379, 0.006483149, 0.013008131, 0.013123901, 0.013239672, 0.013355442, 0.013471213, 0.013586983, 0.013702754, 0.013818524, 0.013934295, 0.014050065, 0.014165836, 0.014281606, 0.014397377, 0.014513148, 0.014628918, 0.014744689, 0.014860459, 0.01497623, 0.015092, 0.015207771, 0.015323541, 0.015439312, 0.015555082, 0.015670853, 0.015786623, 0.015902394, 0.016018164, 0.016133935, 0.016249705, 0.016365476, 0.016481246, 0.016597017, 0.016712787, 0.016828558, 0.023353539, 0.02346931, 0.02358508, 0.023700851, 0.023816621, 0.023932392, 0.024048163, 0.024163933, 0.024279704, 0.024395474, 0.024511245, 0.024627015, 0.024742786, 0.024858556, 0.024974327, 0.025090097, 0.031615079, 0.031730849, 0.03184662, 0.03196239, 0.032078161, 0.032193931, 0.032309702, 0.032425472, 0.032541243, 0.032657013, 0.032772784, 0.032888554, 0.033004325, 0.033120095, 0.039645077, 0.039760847, 0.039876618, 0.039992388, 0.040108159, 0.040223929, 0.0403397, 0.040455471, 0.040571241, 0.047096222, 0.047211993, 0.047327764, 0.047443534, 0.047559305, 0.047675075, 0.047790846, 0.047906616, 0.054431598, 0.054547368, 0.054663139, 0.054778909, 0.05489468, 0.05501045, 0.055126221, 0.055241991, 0.055357762, 0.061882743, 0.061998514, 0.062114284, 0.062230055, 0.062345825, 0.062461596, 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0.880959084, 0.887599836, 0.894240588, 0.90076557, 0.907406322, 0.913931303, 0.920572055, 0.927097036, 0.933622018, 0.94026277, 0.946787751, 0.953312733, 0.959953484, 0.966478466, 0.973119218, 0.97975997, 0.986284951, 0.992925703, 0.999450685, 1.006091437, 1.012732188, 1.019488711, 1.026129463, 1.032885985, 1.039526737, 1.046051719, 1.0525767, 1.059101682, 1.065626663, 1.072151644, 1.078676626, 1.091610818, 1.085201607, 1.0981358, 1.111069992, 1.104660781, 1.117594973, 1.124119955, 1.137054147, 1.130644936, 1.143579128, 1.15010411, 1.163038302, 1.156629091, 1.169563284, 1.176088265, 1.182613246, 1.195547439, 1.189138228, 1.20207242, 1.208597402, 1.221531594, 1.215122383, 1.228056575, 1.240990768, 1.234581557, 1.25392496, 1.247515749, 1.266859152, 1.260449941, 1.279793345, 1.273384134, 1.292727537, 1.286318326, 1.31207094, 1.305661729, 1.299252518, 1.331414343, 1.325005132, 1.318595921, 1.350757746, 1.344348536, 1.337939325, 1.37010115, 1.363691939, 1.357282728, 1.389444553, 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1.736931187, 1.730521977, 1.724112766, 1.717703555, 1.711294344, 1.704885133, 1.698475922, 1.692066711, 1.6856575, 1.679248289, 1.672839079, 1.666429868])

Y := Vector[row](782, [0, 0.006409211, 0.012818422, 0.019227633, 0.025636844, 0.032046054, 0.038455265, 0.044864476, 0.051273687, 0.057682898, 0.064092109, 0.07050132, 0.076910531, 0.083319742, 0.089728953, 0.096138163, 0.102547374, 0.108956585, 0.115365796, 0.121775007, 0.128184218, 0.134593429, 0.14100264, 0.147411851, 0.153821061, 0.160230272, 0.166639483, 0.173048694, 0.179457905, 0.185867116, 0.192276327, 0.198685538, 0.205094749, 0.21150396, 0.21791317, 0.224322381, 0.230731592, 0.237140803, 0.243550014, 0.249959225, 0.256368436, 0.262777647, 0.269186858, 0.275596068, 0.282005279, 0.28841449, 0.294823701, 0.301232912, 0.307642123, 0.314051334, 0.320460545, 0.326869756, 0.333278967, 0.339688177, 0.346097388, 0.352506599, 0.35891581, 0.365209251, 0.371618461, 0.378027672, 0.384436883, 0.390846094, 0.397255305, 0.403664516, 0.410073727, 0.416482938, 0.422892149, 0.429301359, 0.43571057, 0.442119781, 0.448528992, 0.454938203, 0.461347414, 0.467756625, 0.474165836, 0.480575047, 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1.964038859, 1.97044807, 1.97674151, 1.983150721, 1.989559932, 1.995969143, 2.002378353, 2.008671794, 2.015081005, 2.021490216, 2.027899427, 2.034308637, 2.040717848, 2.047011289, 2.0534205, 2.05982971, 2.066238921, 2.072648132, 2.079057343, 2.085350784, 2.091759994, 2.098169205, 2.104578416, 2.110987627, 2.117281068, 2.123690278, 2.130099489, 2.1365087, 2.142917911, 2.149211351, 2.155620562, 2.162029773, 2.168438984, 2.174848195, 2.181141635, 2.187550846, 2.193960057, 2.200369268, 2.206778479, 2.213071919, 2.21948113, 2.225890341, 2.232299552, 2.238708763, 2.245117974, 2.251411414, 2.257820625, 2.264229836, 2.270639047, 2.277048258, 2.283341698, 2.289750909, 2.29616012, 2.302569331, 2.308978542, 2.315387753, 2.321681193, 2.328090404, 2.334499615, 2.340908826, 2.347318037, 2.353727247, 2.360020688, 2.366429899, 2.37283911, 2.379248321, 2.385657531, 2.392066742, 2.398360183, 2.404769394, 2.411178604, 2.417587815, 2.423997026, 2.430406237, 2.436699678, 2.443108888, 2.449518099, 2.45592731, 2.462336521, 2.468629962, 2.475039172, 2.481448383, 2.487857594, 2.494266805, 2.500676016, 2.506969456, 2.513378667, 2.519787878, 2.526197089, 2.5326063, 2.539015511, 2.545308951, 2.551718162, 2.558127373, 2.564536584, 2.570945795, 2.577355006, 2.583648446, 2.590057657, 2.596466868, 2.602876079, 2.60928529, 2.61557873, 2.621987941, 2.628397152, 2.634806363, 2.641215574, 2.647624784, 2.653918225, 2.660327436, 2.666736647, 2.673145858, 2.679555068, 2.685848509, 2.69225772, 2.698666931, 2.705076141, 2.711485352, 2.717778793, 2.724188004, 2.730597215, 2.737006425, 2.743415636, 2.749824847, 2.756118288, 2.762527499, 2.768936709, 2.77534592, 2.781639361, 2.788048572, 2.794457782, 2.800866993, 2.807276204, 2.813569645, 2.819978856, 2.826388066, 2.832797277, 2.839206488, 2.845499929, 2.851909139, 2.85831835, 2.864727561, 2.871021002, 2.877430213, 2.883839423, 2.890248634, 2.896542075, 2.902951286, 2.909360496, 2.915769707, 2.922178918, 2.928472359, 2.93488157, 2.94129078, 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4.514219898, 4.514335668, 4.520050256, 4.520166026, 4.520281797, 4.520397568, 4.526112155, 4.526227926, 4.526343696, 4.532174055, 4.532289825, 4.532405596, 4.538351724, 4.538467495, 4.544413624, 4.544529394, 4.544645165, 4.550591294, 4.550707064, 4.556653193, 4.556768963, 4.556884734, 4.562715092, 4.562830863, 4.562946633, 4.568661221, 4.568776992, 4.568892762, 4.569008533, 4.574491579, 4.574533412, 4.57460735, 4.574649182, 4.57472312, 4.574764953, 4.574838891, 4.574880723, 4.574954661, 4.574996494, 4.575112264, 4.575228035, 4.575343805, 4.575459576, 4.575575346, 4.575691117, 4.579743085, 4.579858856, 4.579974626, 4.580090397, 4.580206167, 4.580321938, 4.580437708, 4.580553479, 4.580669249, 4.58078502, 4.582216098, 4.582331869, 4.582447639, 4.58256341, 4.58267918, 4.582794951, 4.582910721, 4.583026492, 4.583142262, 4.583258033, 4.583373803, 4.583489574, 4.583605344, 4.583721115, 4.583836885, 4.583952656, 4.584068427, 4.584184197, 4.584299968, 4.584415738, 4.584531509, 4.584647279, 4.58476305, 4.58487882, 4.584994591, 4.585110361, 4.585226132, 4.585341902, 4.585457673, 4.585573443, 4.585689214, 4.585804984, 4.585920755, 4.586036525])

(1) for i from 1 to 10 do;

(2) for j from 1 to 10 do:

(3) PSLQ([f(i]), f(j)]);

(4) od: od:

What I want is that if there is an error in line (3) then the program ignores it and goes to next do. How can I got that?

Hello, I have the problem where my Maple worksheet involves very high-precision calculations which result in graphs with a large number of data points. This can result in the file being hundreds of MB large. However, I do not need to necessarily save all these data points inside the worksheet itself since they can easily be recreated. To save disk space, I would prefer to only save the generating commands and not any plots or array data, etc. Is there a way to do this?

simp.mw

please see simp.mw file

How did Student:-ODEs:-ODESteps([ode,ic]); managed to get this zero solution to this ode? I can't follow the logic it did.

Any ideas what it is doing in the 4th step there?
 

Download strange_ode_steps_solution_june_20_2024.mw

(Tested on Maple 2021.1 and 2024.0, on Mac)

I want to write a Maple procedure that takes advantages of the latest features but doesn't break on older versions of Maple.

So I can write something like this:

   if version() >= VERSION then new_method else old_method end if

This works, but it has the problem that the version( ) command not only returns a version number but also writes three lines to the screen, like this:

 User Interface: 1794891
         Kernel: 1794891
        Library: 1794891

I don't want those lines to appear every time the procedure is used but I don't know how to make them go away.  Is there a way, or is there a better approach to achieving what I want?

Thanks, Brendan.

When I began posting replies or answers in Mapleprimes I remember Carl Love explaining me the difference between them.
I was a newbie by then but I think I've grown up and now I know the difference between a reply and a comment.
For reasons of my own, which I will perhaps explain in a post one day, I have decided to sent only comments and no more answers.

Unfortuntely administrators, or maybe a robot, keep turning my comments into answers.
Which in turn forces me to convert these answers into comments, which are then converted back into answers... which may never end and is a complite waste of time.

Is there a way to declare that I want my choices to be respected?

(For the record I've even written in the header of my comment that I didn't want it to be converted into an answer, but the comment was removed and the conversion done !)

Hello everyone

I need help solving a system of equations as below. I'm looking for a way to do it, but I don't understand the general concept of how such an equation is calculated. So far I've been using a package in LabVIEW that worked similarly to Simulink and that was clear to me, whereas here I'm overwhelmed by the multitude of options and that's why I'm asking for help.

I need to solve these equations analogously to Matlab-Simulink, i.e., a time interval and integration step, and a numerical procedure in symbolic versions.

Help_me.mw

Hi MaplePrimes,

I have decided to look for an odd perfect number.  
I want Maple code to determine if there is a perfect number beween bounds on a factor.
For definitions of deficient and perfect and abundant numbers, see
https://mathworld.wolfram.com/DeficientNumber.html
https://mathworld.wolfram.com/PerfectNumber.html
https://mathworld.wolfram.com/AbundantNumber.html

I need some sort of loop that closes in on the edge of abundant/deficient numbers.

Specifically, an IF() statement is needed about wheather the function

sigma(a)-2*a is positive or negative.

Regards,

Matt

abundant_edge_30.mw

I see this question https://mathematica.stackexchange.com/questions/304317/how-to-draw-a-number-of-circles-inscribed-in-a-square-so-that-the-sum-of-the-rad

I have a square with length of side is $a$. How to draw a number of circles inscribed in a square so that the sum of the radii of the circle is greatest? In the below picture is twenty circles inscribed in a square. We can consider number of circles are 5, 6, ... We consider number of the circles is fixed.

How can I tell Maple to do that.

Have a list of four projective points. I need to check that they are colinear projectively. If one point is at infinity i.e. 0 in z position I can chech if combination of cross product and dot product is 0.
a)  What is a good way to find if one ot the four has zero in z position?

b) Having found that is there a neat way of piching the next two/three points by making the count wrap automatically. e.g 3  then 4,5,6 i.e. 3,4,1,2

Download 2024-06-18_Q_4_points_projective_colinear.mw

I was wondering if Maple could be setup in a way that no parallel processing is performed (as on a single core)?

I know, it's a poor way to test an algorithim/method for thread safety (i.e. deterministic behaviour). But it is better than nothing.

Are there other ways to test for thread safety?