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Fig. 2.
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Voids with r > 9 h−1 Mpc (spheres) found in a region of P18 box catalogue (black and red points) with number density 3 × 10−3 h3 Mpc−3. Points that define the voids (i.e. those lying in their surface) are highlighted with a red circle. The volume of the box is 803 h−3 Mpc3.
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