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# Yuechuan Chen

9 total contributions since 2019

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Question

Integer check with a symbolic variable
So I have: s=sym('10517669'); p=nextprime(8*(S^4)); if float((p-1)/2)==(p-1)/2 ... end I know float only works for si...

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Question

Symbolic computation ERROR?
p=sym('5744092954902128823202697'); randi([2,p-2]) So I've defined p and tried to compute randi([2,p-2]), Matlab returns: 'Siz...

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Question

Powermod involving REALLY large integers
So basically I'm trying to use powermod with very big numbers. I have s=14736874769152501643685660145420817562210437816775431428...

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Question

Highest power of 2 that divides n.
Never mind I messed up. n=sym('94315998522576010519588224930693232398146802027362761139521'); a=7; i=1;%this is a counter tha...

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Highest power of 2 that divides n.
n=sym('94315998522576010519588224930693232398146802027362761139521'); a=7; i=1; while mod(n-1,2^i)==0 i=i+1; end i r=...

Question

Computation's with large numbers.
So, I'm trying to divide n-1( n=94315998522576010519588224930693232398146802027362761139521) by 2^143, I stored n has a symbolic...

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Question

How to draw a nicer graph
x=-2*pi:pi/100:2*pi; y=sin(3*x); z=cos(3*x); plot(x,y,'k',x,z,'b') plot(x,y,'--',x,z,'-') Hi, I've plotted the graph of c...

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Question

How to use fzero in a loop to obtain the first 3 positve solutions for cos3x=sin3x?
As it says in the title, I can't figure a way to do it. I've tried for loops but it didn't quite work. Thanks!