Tachyonic Teleparallel Dark Energy in Phase Space

Table 3

Conditions for 𝜈₂, 𝜈₃, and 𝜈₄ to be positive or negative. Here, 𝜉̂=32|𝜉|𝑢²_𝑐−3.

Eigenvalues	Condition
𝜈2>0	𝜆1+12𝜆2^1/3>3+9+3𝜉̂ or 𝜆1+12𝜆2^1/3<3−9+3𝜉̂
𝜈2<0	3−9+3𝜉̂<𝜆1+12𝜆2^1/3<3+9+3𝜉̂
𝜈3,4>0	𝜆1+12𝜆2^1/3>−6+36+3𝜉̂
𝜈3,4<0	𝜆1+12𝜆2^1/3<−6+36+3𝜉̂