
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
Ellipse $C$: $\frac{x^2}{m^2+1}+\frac{y^2}{m^2}=1 (m > 0)$ has foci $F_{1}$ and $F_{2}$, and the endpoints of the minor axis is $P$. If $∠F_1PF_2=\frac{2π}{3}$, then $m=\_\_\_\_\_\_$.

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