I've been looking forward to a refresher for a while. Very excited to sign up for this :)

Hello,

Very nice refresher! I'm happy to follow the lessons.

I suspect a typo in Lesson 6 about Sets with One vector.

v={0,0,0} was said to be linearly independent and v={2,4,7} was said to be linearly dependent. It should be the other way around.

This topic was in Quiz 1, so be careful classmates. :-)

Hi,

Please check. I still do not receive reminder emails and perhaps other course-related information.

Best Regards,

Juergen

Problem solved. Thanks for support.

Hello,

These are indeed typos in Lesson 6 and will be fixed soon (I believe that they exist only in the transcript, but the video is fine).

Thank you for the information. I apologize for the confusion.

Hello Juergen,

Thank you for your encouraging comments about the study group and the course.

Regarding Problem 3 in Quiz 5, there is no clearcut "Yes" or "No" answer since the question mentions distinct eigenvectors rather than distinct eigenvalues for a 2X2 symmetric matrix. As a counterexample, one may note that any pair of linearly independent vectors in the plane are eigenvectors of IdentityMatrix[2] but they will, in general, not be orthogonal, so "not enough information" seems preferable as the answer.

In quiz 2 problem 2, none of the multiple-choice, when multiplied, produces the matrix A. Can there be a typo? G. Singh

Thank you, Gurbax and John.

There is indeed an issue with this problem which is expected to be fixed soon.

Thanks, Devendra. But, I already answered the original question and submitted quiz2 scoring 100%..Do I need to re-take the quiz? That's double jeopardy (LOL).

Hi Devendra: Thank you for clarifying the confusion in quiz 2 problem 2. I love your videos. Thanks for making them available. G. Singh

Greetings, Is there a reference providing guidance on making memory efficient 3D graphics?

I made some 3D graphics of some objects that are built up from a selection of smaller 3D graphics using Graphics3D[]. I was not aware of the Translate[] function at the time and built in variables to translate the 3D graphic in space so the main graphic could be replicated into an array. This approach worked but consumed around 2.5 GB of memory with only a few dozen 3D graphic objects being shown.

I rebuilt the small 3D graphics using Graphics3D[Translate[]...]. I also removed Show[] where possible so that it did not get nested many times, and the memory usage is now around 330 MB.

The main graphic has the form:

mainGraphic[{x_,y_,z_}]:={top[{x,y,z}], bottom[{x,y,z}], rside[{x,y,z}], lside[{x,y,z}]}

Each element of the graphics as the form

top[{x_,y_,z_}]:=Graphics3D[Translate[{Blue, Cuboid [{},{}], ....},{x,y,z}],Boxed -> False, Lighting -> "Neutral"]

My next step is the simplify the element graphics to lists of WL functions [{Blue, Cuboid [{},{}], ....}, and just have one Graphics3D and Translate function in the mainGrapchic function of my 3D graphic objects. If would be helpful to know if this is the most efficient approach. It would be useful to know how to translate any Graphic3D type such as those generated by Plot3D.

Sincerely, Jay Morreale

Hello @Shivam Sawarn. I am sorry you experienced this problem. I'll ask Christine from our Wolfram U staff to contact you so that you receive your certificate.

Thanks @Jamie Peterson for your help.

Thank you for this question, @Shivam Sawarn. I'm glad to say that Multiparadigm Data Science Level 2 certification is now available. This is an advanced project-based certification. We have plans for additional certifications in the near future.