Viscous Bianchi Type I Universe with Stiff Matter and Decaying Vacuum Energy Density

<table>Variation of vacuum energy <svg height="10.6625" id="M157" style="vertical-align:-0.0pt" version="1.1" viewbox="0 0 11.1 10.6625" width="11.1" xmlns="http://www.w3.org/2000/svg">
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<tspan style="font-size: 12.50px; " x="0" y="0">Λ</tspan>
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</svg> with cosmic time <svg height="9.125" id="M158" style="vertical-align:-0.11285pt" version="1.1" viewbox="0 0 5.0124998 9.125" width="5.0124998" xmlns="http://www.w3.org/2000/svg">
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<g transform="translate(72,-64.7)">
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<tspan style="font-size: 12.50px; " x="0" y="0">𝑡</tspan>
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International Scholarly Research Notices

fig1

Figure 1

Figure 1: Viscous Bianchi Type I Universe with Stiff Matter and Decaying Vacuum Energy Density 