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Hi

SageMath 8.8 notebook OS=W10

asking the real part of this function systematically crash the kernel with the message :

The kernel appears to have died. It will restart automatically.

n=var('n')

assume(n>=0)
assume(n,'integer')
a_n=1/20*(1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) + 25) - 1/20*(-1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) - 25) - 1/12*(1/2*I*sqrt(3) + 1/2)^n*(I*sqrt(3) + 3) - 1/12*(-1/2*I*sqrt(3) + 1/2)^n*(-I*sqrt(3) + 3)
show(a_n)
a_n.real_part()
#real_part(a_n)

Hi

SageMath 8.8 notebook OS=W10

asking the real part of this function systematically crash the kernel with the message :

The kernel appears to have died. It will restart automatically.

n=var('n')
assume(n>=0)
assume(n,'integer')
a_n=1/20*(1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) + 25) - 1/20*(-1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) - 25) - 1/12*(1/2*I*sqrt(3) + 1/2)^n*(I*sqrt(3) + 3) - 1/12*(-1/2*I*sqrt(3) + 1/2)^n*(-I*sqrt(3) + 3)
show(a_n)
a_n.real_part()
#real_part(a_n)

Hi

SageMath 8.8 notebook OS=W10

asking the real part of this function systematically crash the kernel with the message :

The kernel appears to have died. It will restart automatically.

n=var('n')
assume(n>=0)
assume(n,'integer')
a_n=1/20*(1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) + 25) - 1/20*(-1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) - 25) - 1/12*(1/2*I*sqrt(3) + 1/2)^n*(I*sqrt(3) + 3) - 1/12*(-1/2*I*sqrt(3) + 1/2)^n*(-I*sqrt(3) + 3)
show(a_n)
a_n.real_part()
#real_part(a_n)

Hi

SageMath 8.8 notebook OS=W10

asking the real part of this function systematically crash the kernel with the message :

The kernel appears to have died. It will restart automatically.

n=var('n')
assume(n>=0)
assume(n,'integer')
a_n=1/20*(1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) + 25) - 1/20*(-1/2*sqrt(5) + 1/2)^n*(11*sqrt(5) - 25) - 1/12*(1/2*I*sqrt(3) + 1/2)^n*(I*sqrt(3) + 3) - 1/12*(-1/2*I*sqrt(3) + 1/2)^n*(-I*sqrt(3) + 3)
show(a_n)
a_n.real_part()
#real_part(a_n)