
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Given the proposition: If the equation $m{x}^{2}+n{y}^{2}=1 (m,n \in \mathbb{R})$ represents an ellipse, then $mn > 0$. Determine the number of true propositions among its converse, inverse, and contrapositive.

Present the answer in LaTex format: \boxed{Your answer}
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