Font test[1YG]
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Math font test: \(Γ(ζ)=∫_ 0^∞t^{ζ-1}e^{-t}\, dt\)
\( ∀ε {\gt} 0 , ∃δ {\gt} 0 , ∀ α , β ∈ ℝ , ‖α − β‖ ≤ δ ⟹ ‖φ(α) − φ(β)‖ ≤ ε \)
\( L¹, A × B , A ∖ B, A ∪ B, A ∩ B, ⋃_ i A_ i, ⋂_ i A_ i ,∑_ i ξ_ i ,∏_ j θ_ j \).
bold 1 is \({\mathbb {1}}\), bold N is \({\mathbb {N}}\)
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