Nothing

```
d <-
function(M, N) {
options(warn = -1)
if ( messages(M) != 1 ) { return( messages(M) ) }
if ( messages(N) != 1 ) { return( messages(N) ) }
if ( (M[4]==1 & N[4]==0) | (M[4]==0 & N[4]==1) | (M[4]==0.5 & N[4]==0.5) )
{
if ( ( sign(M) == "Positive" ) & ( sign(N) == "Positive" ) )
{
a1 = M[1] / N[1]
a2 = ( ( M[1]*N[3] ) + ( N[1]*M[2] ) ) / (N[1]^2)
a3 = ( ( M[1]*N[2] ) + ( N[1]*M[3] ) ) / (N[1]^2)
a4 = M[4]
print( noquote( paste0("the result of division is approximately (core = ", a1, ", left spread = " , a2, ", right spread = " , a3, ")"
, if ( a4 == 0 ) { paste0(" LR" ) } else if ( a4 == 1 ) { paste0(" RL" ) } else { paste0(" L" ) } ) ) )
return( invisible( c(a1,a2,a3,a4) ) )
}
else
{
return( noquote( paste0("A regular approximation is not defined for division since at least one of LR fuzzy numbers is not positive" ) ) )
}
}
else
{
return( noquote( paste0("Division has NOT a closed form of a LR fuzzy number" ) ) )
}
}
```

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