Update README.md

README.md

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-license: apache-2.0
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+---
+license: apache-2.0
+tags:
+- java
+- qwen2
+- qwen2.java
+---
+# Pure quantizations of `Qwen2-Math-7B-Instruct` for [qwen2.java](https://github.com/mukel/qwen2.java).
+
+In the wild, Q8_0 quantizations are fine, but Q4_0 quantizations are rarely pure e.g. the output.weights tensor is quantized with Q6_K, instead of Q4_0.  
+A pure Q4_0 quantization can be generated from a high precision (F32, F16, BFLOAT16) .gguf source with the quantize utility from llama.cpp as follows:
+
+```
+./quantize --pure ./Qwen2-7B-Math-Instruct-F16.gguf ./Qwen2-7B-Math-Instruct-Q4_0.gguf Q4_0
+```
+
+Original model: [https://huggingface.co/Qwen/Qwen2-Math-7B-Instruct](https://huggingface.co/Qwen/Qwen2-Math-7B-Instruct)
+
+
+## Model Details
+
+
+For more details, please refer to the original [blog post](https://qwenlm.github.io/blog/qwen2-math/) and [GitHub repo](https://github.com/QwenLM/Qwen2-Math).
+
+