Homework Statement
Three-phase transformer, 20/0.5 kV, dyn11. Not connected to the grid.
DC-resistance between two primary windings is measured to be 80 ohm. What is the DC-resistance of ONE primary coil
Homework Equations
The Attempt at a Solution
I thought I could just...
Homework Statement
Are the given functions injective? Surjective?
a) seq: N -> Lists[N]
b) f: Lists[A] -> P(A), f(x)=(<x1,x2,...,xn>)={x1,x2,...,xn}
Homework Equations
The Attempt at a Solution
a) Ok so the domain contains a sequence of natural numbers.
and the range contains a list...
Homework Statement
I'm supposed to prove that this statement is a tautology (with truth table):
(p -> ((p OR q) AND ~q)) = (~p OR ~q) AND p
Homework Equations
The Attempt at a Solution
p | q | ~p | ~q | p OR q | (p OR q) AND ~q | p -> ((p OR q) AND ~q) | (~p OR ~q) | (~p OR...
Ok I dont understand one thing...We ahd this example in school
We have poset < {1,2,5,7,10,14,35,70}, | >
| meas factor, for example a|b means b=ka, where k=integer
and we got this Hasse diagram
70
/ | \
10 14 35
| X X |
2 5 7
\ | /
1
X means...
Homework Statement
Find the equivalence class [2] for the following equivalence relations:
a) R: Z <-> Z, where xRy, iff |x| = |y|
b) T: N <-> N, where xTy, iff xmod4 = ymod4
N means natural numbers etc...there wasnt the correct symbols in the latex reference
Homework Equations
??
The...