Let Eλ be the attractor of the contractive IFS S0(x) = x/7,S1(x) = (x + λ)/7, S2(x) = (x + 2)/7, S3(x) = (x + 4 - λ)/7, S4(x) = (x + 6 - 2λ)/7 and S5(x) = (x + 6)/7 with λ ∈ [0,1] ∩ Q. In this paper,the geometric structure and the Hausdorff dimension of Eλ are discussed.
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