How to plot the surface $z=\sum_{n=0}^100 x^{2-n}y^{n/2}$ for $0<x,y<10$ in MATLAB ?

How to plot the surface $z= f(x,y)=\sum_{n=0}^100 x^{2-n}y^{n/2}$ for $0

05 June 2018 242 7 View

As we know that the double sequence $x_{mn}$ represents an infinite matrix, in the similar way how we represent a triple sequence $x_{lmn} $ ?

How we represent a triple sequence?

08 September 2017 9,115 2 View

How could we represent a four dimensional identity matrix ?

06 July 2015 6,638 10 View

Is there any name of a matrix with all elements above super diagonal position at zero?

31 December 2014 5,368 6 View

Is there any formula to find the nth root of a Matrix ?

We know square root of a matrix, but in general what is the fractional and non-integral power of a non zero matrix ?

08 September 2014 4,318 1 View

What is the use of Kernel in integral transform ?

07 August 2014 1,476 1 View

What is the time complexity for the inversion and determinant of a triangular matrix of order n?

By backward and forward substitutions we calculate the inverse of a triangle. How far is it better than the determinant method concerning the running time?

03 April 2014 5,441 5 View

Is there any series expression of the Euler gamma function?

Although there are many singularities of Euler gamma function in negative real axis, but for the positive axis the function is well defined.

02 March 2014 2,394 9 View

Is there any geometrical relation between fractional calculus and fractal ?

Of course there are some concepts of fractional calculus that are co-related to fractal. But how are they geometrically related ?

02 March 2014 2,374 3 View

Does Laplace transform of e^{t^2} exist ?

Although, the function e^{t^2} is not exponentially bounded and due to linearity of Laplace transform we may write L {(e^{t^2}}=L{1+t^2+(t^4)/2!+(t^6)/3!+....}...

01 February 2014 3,439 4 View

Sample dilution for quantitative analysis using ELISA?

If the detection range is in ng/ml but the reference range is in ug/ml for a molecule or protein in serum or plasma .how to dilute and what is the initial volume to be taken for quantitative analysis

02 March 2021 7,670 3 View

Concentration of DNA?

Hello everyone! Is a normal value 295.8 ug/ul for cDNA? If not what does it mean? Where is the mistake? The measurement was done with nano drop. Thank you!

09 February 2021 6,202 1 View

What is the reference value of THD in BLDC MOTOR speed control ?

i used to control EHO+ANFIS to MRPID to Landsman converter for bldc drive i got 7% but some of them are telling IEEE standards are < 5% is it correct for Drives ?

07 February 2021 5,892 1 View

How to know the threshold limit value of a sar image...??

i want to do thresholding by segregation of water areas from non water areas for that i am using model maker in ERDAS but i am unable to get the threshold limit value of my image.

26 January 2021 8,277 1 View

No title

14 January 2021 8,086 37 View

What are the most important values we should teach to our students?

In one of my articles "The need for a values-based university curriculum" https://www.universityworldnews.com/post.php?story=2019092415204357 I propose that higher education should adopt a...

14 January 2021 2,304 95 View

How do you transmit and evaluate ethics and moral values in you teaching activity?

Ethics and moral values have always being an essential part of teaching and scientific research. How do you teach and evaluate these essential subjects in your daily interaction with students?

23 December 2020 5,058 7 View

What would cause different shape DMA loss modulus curve in different batches of PC+ABS?

I have some DMA curves of PC+ABS from different batches. The PC loss modulus peak is fairly consistent but one batch has a peak value 10degC lower than the rest. Another peaks at the normal value,...

06 December 2020 809 2 View

Is there any variation in d dimer levels due to the different methods adopted for analysis?

While doing my research work, I have noticed that the D- dimer levels of normal animals (dogs) are given in different ranges in different publications. Is there any variation occuring in d dimer...

08 November 2020 296 1 View

How to perform correlation testing between two datasets in which one dataset has gender-specific reference ranges?

I want to test for correlation between dataset A and dataset B (both have numerical data). For example, dataset B consist of hemoglobin values which have different reference ranges for male and...

20 October 2020 9,550 6 View