<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="$\aleph_1$" id="E1"><mml:msub><mml:mi>ℵ</mml:mi><mml:mn>1</mml:mn></mml:msub></mml:math>-directed inverse systems of continuous images of arcs
International journal of mathematics and mathematical sciences