Let E be a Banach lattice with a 1-unconditional basis {ei:i∈N}\documentclass[12pt]{minimal}
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\begin{document}$$\{e_i: i \in \mathbb {N}\}$$\end{document}. Denote by Δ(⊗ˇn,ϵE)\documentclass[12pt]{minimal}
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\begin{document}$$\Delta (\check{\otimes }_{n,\epsilon }E)$$\end{document} (resp. Δ(⊗ˇn,s,ϵE)\documentclass[12pt]{minimal}
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\begin{document}$$\Delta (\check{\otimes }_{n,s,\epsilon }E)$$\end{document}) the main diagonal space of the n-fold full (resp. symmetric) injective Banach space tensor product, and denote by Δ(⊗ˇn,|ϵ|E)\documentclass[12pt]{minimal}
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\begin{document}$$\Delta (\check{\otimes }_{n,|\epsilon |}E)$$\end{document} (resp. Δ(⊗ˇn,s,|ϵ|E)\documentclass[12pt]{minimal}
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\begin{document}$$\Delta (\check{\otimes }_{n,s,|\epsilon |}E)$$\end{document}) the main diagonal space of the n-fold full (resp. symmetric) injective Banach lattice tensor product. We show that these four main diagonal spaces are pairwise isometrically isomorphic. We also show that the tensor diagonal {ei⊗⋯⊗ei:i∈N}\documentclass[12pt]{minimal}
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\begin{document}$$\{e_i\otimes \cdots \otimes e_i: i \in \mathbb {N}\}$$\end{document} is a 1-unconditional basic sequence in both ⊗ˇn,ϵE\documentclass[12pt]{minimal}
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\begin{document}$$\check{\otimes }_{n,\epsilon }E$$\end{document} and ⊗ˇn,s,ϵE\documentclass[12pt]{minimal}
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\begin{document}$$\check{\otimes }_{n,s,\epsilon }E$$\end{document}.
