Exercise · ZW-HAHN-JORDAN-DECOMPOSITION-008 · ★★☆ Intermediate
If \(\nu^+(X)=3\) and \(\nu^-(X)=1\), find \(\nu(X)\) and \(|\nu|(X)\).
Choose one option.
Show answer
- C. \(\nu(X)=2,\ |\nu|(X)=4\)
Explanation
We have \(\nu(X)=3-1=2\) and \(|\nu|(X)=3+1=4\). Swapping sum and difference gives the other combinations.
Review the concept: Hahn–Jordan decomposition
The Hahn–Jordan decomposition splits a signed measure \(\nu\) into the difference of two mutually singular positive measures, \(\nu = \nu^+ - \nu^-\).
\[\nu = \nu^+ - \nu^-,\quad \nu^+ \perp \nu^-\]
More practice problems: hahn–jordan decomposition
- ZW-HAHN-JORDAN-DECOMPOSITION-001 State what the Hahn–Jordan decomposition asserts for a signed measure nu.
- ZW-HAHN-JORDAN-DECOMPOSITION-002 State the property of the sets P and P^c in the Hahn decomposition.
- ZW-HAHN-JORDAN-DECOMPOSITION-003 Name the positive measures appearing in the Hahn–Jordan decomposition of nu.
- ZW-HAHN-JORDAN-DECOMPOSITION-004 Name the total variation of a signed measure nu in terms of nu^+ and nu^-.
- ZW-HAHN-JORDAN-DECOMPOSITION-005 State whether the Hahn–Jordan decomposition of a signed measure is unique.
- ZW-HAHN-JORDAN-DECOMPOSITION-006 Let nu(E)=∫_E f dm with f(x)=x on [-1,2]. Find nu^+([-1,2]).
- ZW-HAHN-JORDAN-DECOMPOSITION-007 With nu(E)=∫_E x dm on [-1,2], compute nu^-([-1,2]).
- ZW-HAHN-JORDAN-DECOMPOSITION-009 Let nu=μ_1-μ_2 with μ_1 and μ_2 finite positive measures. What is nu^+ if μ_1perpμ_2 with μ_1 conce…
← ZW-HAHN-JORDAN-DECOMPOSITION-007 ZW-HAHN-JORDAN-DECOMPOSITION-009 →