general topology - The fundamental group of $\mathbb{R}^3$ with its non-negative half-axes removed - Mathematics Stack Exchange

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Determine whether the fundamental group of $\mathbb{R}^3$ with its non-negative half-axes removed is trivial, infinite cyclic, or isomorphic to the figure eight space. I found this answer: Why d
general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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general topology - The fundamental group of $\mathbb{R}^3$ with its  non-negative half-axes removed - Mathematics Stack Exchange
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